Everglades

Everglades National Park is located at the southern tip of the Florida peninsula, encompassing 1,507,850 acres of subtropical wilderness stretching from the outskirts of Miami to the Gulf of Mexico and Florida Bay ^[1]. Authorized by Congress on May 30, 1934, and dedicated by President Harry S. Truman on December 6, 1947, the park was the first national park established to protect a biological system rather than a scenic or geological feature ^[2].

Often described as a "river of grass," the Everglades is defined by remarkably flat terrain with a highest point of just eight feet above sea level, where water historically flowed roughly 100 miles southward dropping only 12 to 14 feet in elevation ^[3]. The park encompasses nine distinct ecosystems including freshwater sloughs, sawgrass marshes, mangrove forests, tropical hardwood hammocks, pinelands, and marine environments, supporting over 350 bird species, 40 mammal species, 50 reptile species, and 300 fish species ^[4].

Everglades National Park holds the rare distinction of being one of only three locations in the world designated simultaneously as a UNESCO World Heritage Site (1979), an International Biosphere Reserve (1976), and a Wetland of International Importance under the Ramsar Convention (1987) ^[5]. The park receives approximately one million visitors annually and shelters 36 federally threatened or endangered species including the Florida panther, the American crocodile, and the West Indian manatee ^[6].

Everglades National Park harbors extraordinary biological diversity across its subtropical wetland landscape, supporting over 350 species of birds, 300 species of fresh and saltwater fish, 40 species of mammals, and 50 species of reptiles ^[1]. This remarkable species richness stems from the park's position at the convergence of temperate and tropical climatic zones, creating habitat conditions found nowhere else in the continental United States. The park's nine distinct ecosystems, ranging from freshwater sloughs to marine environments, provide niches for an exceptionally diverse assemblage of wildlife, including 36 federally threatened or endangered species ^[2].

The Everglades is recognized as the most significant breeding ground for tropical wading birds in North America, with vast rookeries supporting species such as great blue herons, tricolored herons, great egrets, snowy egrets, white ibis, roseate spoonbills, and wood storks ^[3]. Wading bird populations in the Everglades during the 1930s included an estimated 20,000 nesting pairs of wood storks alone, though these numbers declined dramatically by the 1970s due to altered water flows from drainage projects ^[4]. The park also provides critical habitat for the endangered Everglade snail kite, a raptor that feeds almost exclusively on apple snails and whose range in the United States is limited to Florida's wetlands, as well as the Cape Sable seaside sparrow, a federally endangered bird found only in the marl prairies of the southern Everglades ^[5].

Among the park's mammal species, the Florida panther stands as one of the most critically endangered large mammals in North America, with approximately 230 individuals surviving in the wild primarily within the Everglades and adjacent Big Cypress Swamp ^[2]. Other mammals inhabiting the park's hardwood hammocks and wetlands include Florida black bears, white-tailed deer, marsh rabbits, river otters, gray foxes, red foxes, and bobcats, though many of these populations have suffered catastrophic declines in recent decades due to predation by invasive Burmese pythons ^[6]. The West Indian manatee, listed as federally threatened, frequents the park's coastal waters and estuaries, where saltwater areas are designated no-wake zones to protect these gentle marine mammals from boat strikes ^[2].

The park's reptilian fauna includes both the American alligator and the American crocodile, making the Everglades one of the only places on Earth where these two large crocodilians coexist ^[7]. The American crocodile, reclassified from endangered to threatened in 2007 following population recovery efforts, maintains approximately 2,000 individuals in Florida with roughly 100 nests recorded annually in the Everglades and Biscayne National Parks. American alligators are far more abundant and serve as a keystone species, creating "gator holes" during the dry season that concentrate water and provide critical refuge for fish, turtles, snails, and other aquatic organisms that sustain the broader ecosystem through drought periods.

The Everglades' marine and estuarine environments, encompassing more than one-third of the park's total area, support a rich diversity of aquatic life including four species of endangered sea turtles: the green, hawksbill, Kemp's ridley, and loggerhead ^[2]. Florida Bay, the largest body of water within the park at over 800 square miles, provides nursery habitat for commercially and recreationally important fish species, crustaceans, and mollusks, with its seagrass beds and algae formations sustaining the food chain that supports all higher vertebrates in the bay ^[8]. The endangered smalltooth sawfish, one of only two federally listed fish species in the park, inhabits the shallow coastal waters where freshwater from the Everglades mixes with the saltwater of the Gulf of Mexico.

However, the park's wildlife faces an unprecedented threat from invasive Burmese pythons, which have become firmly established throughout the Greater Everglades region with conservatively tens of thousands of individuals now present ^[6]. A landmark 2012 study documented staggering declines in native mammal populations since 1997: raccoons declined 99.3 percent, opossums 98.9 percent, and bobcats 87.5 percent, while marsh rabbits, cottontail rabbits, and foxes effectively disappeared entirely from surveyed areas ^[9]. Subsequent experimental research confirmed that pythons accounted for 77 percent of marsh rabbit mortalities and that python predation appeared to preclude the persistence of rabbit populations altogether, providing direct causal evidence linking the invasive predators to the catastrophic mammal declines observed throughout the park's most remote southern regions where pythons have been established the longest ^[10].

Everglades National Park supports a remarkably diverse assemblage of plant life shaped by the convergence of temperate North American and tropical Caribbean floristic zones, harboring 39 native orchid species and approximately 750 other native seed-bearing plants across nine distinct ecosystems ^[1]. The distribution of vegetation throughout the park is controlled by hydrologic patterns including the depth, timing, and duration of flooding, as well as soil type, topography, fire frequency, and both natural and human-caused disturbances. Of the park's native plant species, 164 are listed by the State of Florida as protected, including 47 threatened and 113 endangered species, while 66 species are considered critically imperiled in south Florida, underscoring the park's irreplaceable role in preserving botanical diversity ^[1].

The vast sawgrass marshes that define the Everglades landscape are dominated by the sedge commonly known as sawgrass, which can grow up to six feet tall in most marshes and reaches heights of ten feet directly south of Lake Okeechobee where nutrient conditions are more favorable ^[2]. These expansive prairies of sawgrass, extending across thousands of acres, create the iconic "river of grass" that inspired Marjory Stoneman Douglas's famous characterization of the region. Freshwater sloughs, the deeper channels through which water flows most consistently, support submerged and floating aquatic plants including bladderwort, waterlily, and spatterdock, while periphyton, a photosynthetic community of algae, bacteria, and microbes, forms the smallest but most fundamental building block of the Everglades food chain ^[1].

The park contains the largest contiguous stand of protected mangrove forest in the Western Hemisphere, a salt-tolerant ecosystem that thrives along the coast where freshwater from the Everglades mixes with saltwater from the Gulf of Mexico and Florida Bay ^[3]. Three species of mangrove trees compose these forests: red mangrove, identifiable by its distinctive stilt-like prop roots; black mangrove; and white mangrove. The mangrove ecosystem serves three critical ecological functions: it provides a valuable nursery for commercially and recreationally important marine species, it offers feeding and nesting grounds for wading birds during the dry months, and it forms the first line of defense against hurricane winds and storm surge during the summer and fall hurricane season ^[3].

Tropical hardwood hammocks, scattered throughout the Everglades as dense islands of broad-leafed trees, develop on natural rises of only a few inches in elevation above the surrounding marsh, yet this slight height difference prevents regular flooding and creates conditions for a distinctive plant community ^[4]. These hammocks support a rich mix of tropical and temperate tree species including mahogany, gumbo limbo, cocoplum, live oak, red maple, and hackberry, with many tropical species of West Indian origin growing at the northern edge of their range. A natural moat forms around tree island hammocks as acids from decaying plant matter dissolve the surrounding limestone, which simultaneously protects the hammock vegetation from fire damage and creates the characteristic teardrop shape visible when hammocks are located in deeper marshes subject to directional water flow.

The park's pine rocklands, dominated by south Florida slash pine growing on exposed limestone substrate, represent one of the most endangered plant communities in the world, with the Everglades preserving the largest remaining stand in south Florida ^[5]. These fire-dependent ecosystems support an amazingly diverse understory of endemic species found nowhere else, including numerous ferns, palms, and wildflowers adapted to the frequent low-intensity fires that maintain the community. The National Park Service conducts prescribed burns to mimic the natural fire regime, as without periodic fire the shade-intolerant pines would be replaced by subtropical hardwoods whose dense canopies would eliminate the specialized understory plants that make pine rocklands globally significant for biodiversity conservation ^[5].

Invasive exotic plants pose one of the most serious threats to the park's native vegetation, with five primary species of concern: Australian pine, old world climbing fern, melaleuca, Brazilian pepper, and seaside mahoe ^[6]. Melaleuca, originally imported from Australia for landscaping, has proven particularly destructive as it rapidly colonizes wetlands and displaces native sawgrass and other marsh vegetation. Park staff actively work to remove invasive species through the Invasive Plant Program, recognizing that plant invasions represent the second greatest threat to native species after direct habitat destruction, with nonnative plants spreading rapidly once established and fundamentally altering the structure and function of native ecosystems ^[6].

The geology of Everglades National Park is fundamentally defined by limestone, a sedimentary rock composed of calcium carbonate that forms the bedrock beneath the park's vast wetlands, though these rocks rarely crop out at the surface due to the extraordinarily flat landscape of extensive marshes and grasslands ^[1]. Florida's geological origins trace back hundreds of millions of years, when the peninsula was part of the African portion of the supercontinent Gondwana; after separation, conditions allowed a shallow marine environment to deposit calcium carbonate in sand, shells, and coral that gradually converted into limestone over millions of years ^[2]. The floor of the Everglades formed between roughly 25 million and 2 million years ago when the Florida peninsula existed as a shallow sea floor, with sedimentary rocks from the Miocene and Pliocene epochs laid down in warm, tropical waters teeming with marine life.

The geologic formations that exert the most influence on the modern Everglades are the Miami Limestone and the Fort Thompson Formation ^[1]. The Miami Limestone, formerly known as the Miami Oolite, comprises the Atlantic Coastal Ridge and much of the floor beneath Florida Bay, formed from tiny spheres called ooids when calcium carbonate settling out of warm seawater coated tiny bits of shell and sand, creating a permeable rock structure that readily holds and transmits water. The older Tamiami Formation, dating to the Pliocene epoch roughly three to five million years ago, consists of sandy fossiliferous limestone containing well-preserved fossils of barnacles, mollusks, corals, echinoids, foraminifera, and calcareous nanoplankton that document the rich marine ecosystems that once covered the region. The Key Largo Limestone formed along ancient reef edges, preserving evidence of the coral reef systems that once thrived along the southeastern Florida coast.

During the Pleistocene Ice Age, dramatic fluctuations in sea level profoundly shaped the Everglades landscape ^[1]. Approximately 130,000 years ago, significant interglacial flooding occurred, and during the peak of the last interglacial stage roughly 100,000 years ago, sea levels in south Florida rose approximately 100 feet above present levels, submerging vast portions of the peninsula. Conversely, during glacial periods when enormous volumes of water were locked in continental ice sheets, sea levels dropped as much as 300 feet below present levels, exposing the entire Florida platform as dry land. These repeated cycles of submersion and exposure dissolved portions of the limestone, creating the karst topography of solution holes, sinkholes, and underground channels that characterize the park's hydrology today.

The Everglades as a functioning wetland ecosystem is remarkably young in geological terms, having formed only about 5,000 years ago when rising sea levels following the last glacial maximum caused the water table to saturate the limestone bedrock and emerge at the surface ^[3]. Water historically flowed from Lake Okeechobee approximately 100 miles southward to Florida Bay, dropping only 12 to 14 feet in elevation across the entire distance, creating the broad, shallow sheet flow that defined the original Everglades system ^[1]. This imperceptible gradient, combined with the flatness and permeability of the underlying limestone, produced the vast slow-moving river of freshwater that sustained the region's unique ecology.

Two primary soil types have developed atop the Everglades limestone over the past several millennia ^[1]. Marl, a light-colored calcium carbonate soil, forms through the accumulation of periphyton during seasonal dry periods and is common in short-hydroperiod marshes where the bedrock lies close to the surface. Peat, a dark brown to black organic soil, develops in areas subject to prolonged flooding where plant material accumulates faster than it decomposes; sawgrass peat appears particularly dark from the ash left behind by frequent fires that burn during the winter dry season. The Rocky Glades region in the eastern Everglades contains extensive karst features where solution holes in the exposed limestone provide critical dry-season refuge for fish, turtles, snails, and other aquatic animals that would otherwise perish during seasonal drawdowns, making these geological features essential to the survival of the broader wetland ecosystem.

Everglades National Park lies across the broad transition zone between subtropical and tropical climates, strongly influenced by the southeast trade winds and the moderating effects of the surrounding Gulf of Mexico and Atlantic Ocean ^[1]. The climate is characterized by two distinct seasons rather than the four experienced across most of the continental United States: a warm, humid wet season running from mid-May through November, and a mild, dry season from December through mid-May. This seasonal rainfall pattern drives the fundamental ecological rhythms of the entire Everglades system, controlling water levels that determine wildlife behavior, plant growth, and the availability of aquatic habitat throughout the year.

Annual precipitation in the Everglades averages approximately 56.4 inches (1,432 millimeters) at the Royal Palm station, with the vast majority falling during the wet season ^[1]. The wettest month is June, which receives an average of 9.07 inches (230 millimeters), and approximately 70 percent of the annual rainfall occurs between May and October, often arriving as brief but intense tropical downpours accompanied by dramatic lightning displays ^[2]. These summer thunderstorms can last from minutes to several hours and are a defining feature of the wet season experience, rapidly raising water levels across the flat landscape and inundating sawgrass prairies that stood dry weeks earlier.

Temperature ranges in the Everglades reflect the region's subtropical to tropical position, with an annual range of less than 20 degrees Fahrenheit between the warmest and coolest months ^[1]. Summer temperatures regularly reach the low 90s Fahrenheit (30 to 35 degrees Celsius), with August averaging the highest maximum of 92 degrees Fahrenheit (33 degrees Celsius), while high humidity pushes the perceived heat index to approximately 105 degrees Fahrenheit (41 degrees Celsius) at 90 degrees with high moisture content. Winter temperatures are considerably more pleasant, ranging from lows in the mid-50s Fahrenheit (12 degrees Celsius) in January, the coolest month at 54 degrees Fahrenheit minimum, to highs in the upper 70s Fahrenheit (25 degrees Celsius), with frost and freezing conditions occurring only rarely during the passage of strong cold fronts.

The dry season from December through mid-May is widely considered the optimal time to visit the park, as lower water levels concentrate fish, reptiles, and other aquatic organisms into smaller pools and sloughs, attracting spectacular congregations of wading birds and making wildlife viewing significantly easier ^[3]. Mosquito populations, which can be extraordinarily dense during the wet season, diminish substantially during the drier months, making outdoor activities far more comfortable for visitors. Conversely, the wet season brings the risk of flooding from hurricanes and tropical storms, when ocean water can rise several feet over the low-lying land, and the official Atlantic hurricane season extends from June 1 through November 30 ^[2].

Climate change poses an existential threat to the Everglades ecosystem, as the park is nearly flat and surrounded on three sides by rising seas ^[4]. Sea level rise has already brought significant observable changes to the landscape, including saltwater intrusion into freshwater marshes and the inland migration of mangrove forests into areas previously dominated by freshwater vegetation. Rising temperatures and altered precipitation patterns threaten to shift the delicate balance between wet and dry seasons that the entire Everglades food web depends upon, with warmer waters potentially favoring invasive species over temperature-sensitive natives and more intense hurricanes potentially causing catastrophic damage to fragile habitats that require decades to recover.

Human habitation in the southern Florida peninsula dates back approximately 15,000 years, when Paleo-Indian peoples first occupied the region during the late Pleistocene when sea levels were significantly lower and the Florida peninsula extended far beyond its current coastline ^[1]. As sea levels rose over subsequent millennia, the landscape gradually transformed into the wetland system known today, and indigenous communities adapted their cultures and subsistence strategies to the evolving environment. Archaeological evidence within the park boundaries consists primarily of shell mounds, which are piles of discarded shells that had been used as tools after their contents were consumed, providing modern researchers with valuable insights into the raw materials and daily practices of the earliest Everglades inhabitants ^[2].

Before European colonization, the region was dominated by two principal indigenous groups: the Calusa along the southwest coast and the Tequesta along the southeast coast ^[2]. The Calusa developed a remarkably complex chiefdom comprising numerous village communities, with their territory centered around modern-day Fort Myers and extending as far north as Tampa, east to Lake Okeechobee, and south to the Florida Keys. Unlike most North American indigenous societies, the Calusa built their civilization on estuarine fisheries rather than agriculture, constructing elaborate shell works featuring ridges, mounds, platforms, and courtyards within their town plans that rivaled the architectural achievements of farming cultures. When Spanish explorers arrived in the sixteenth century, they documented the Calusa's intricate ceremonial art, complex political system, and sophisticated understanding of coastal ecology, with population estimates ranging from 4,000 to 7,000 individuals ^[3].

The Tequesta, the second most powerful group in south Florida, occupied the southeastern coast around present-day Biscayne Bay and the Miami River, while the Jega and Ais peoples inhabited other portions of the east coast ^[2]. Like the Calusa, the Tequesta relied heavily on fishing and systematic foraging for sustenance, utilizing the abundant coastal resources of shellfish, fish, sea turtles, and manatees. Both societies suffered catastrophic population declines following European contact, as diseases introduced by Spanish colonizers devastated communities with no prior exposure to Old World pathogens. After more than 210 years of relations with the Spanish, both indigenous societies had lost cohesiveness, and when England gained control of Florida in 1763, the Calusa and Tequesta had been severely decimated; official records indicate that the remaining survivors were transported to Havana in the late eighteenth century ^[1].

The Seminole people, formed primarily from Creek and other displaced indigenous groups from northern Florida and the American Southeast, entered the Everglades in the early nineteenth century after being pushed southward by armed conflict and the expanding American frontier ^[4]. The Second Seminole War, beginning in 1835 and lasting seven years, drove many Seminole families deep into the Everglades interior, where the dense wetlands provided natural refuge from pursuing United States military forces and resulted in some of the first recorded American explorations of the region's most remote areas. The Third Seminole War, beginning in 1855, led the Seminole to cede over two million acres of land, though a determined group of several hundred individuals refused removal to Indian Territory in Oklahoma and instead remained hidden in the Everglades, waging what amounted to a four-decade guerrilla resistance against forced relocation ^[2].

The Miccosukee Tribe, which shares cultural roots with the Seminole but maintained distinct political and linguistic traditions, established communities along the Tamiami Trail after the roadway's completion in 1928 connected Tampa and Miami through the heart of the Everglades ^[5]. Known as the Trail Indians, many Miccosukee kept more traditional practices and maintained a closer connection to the Everglades landscape than their Seminole relatives. The Miccosukee gained separate federal recognition in 1962 and continue to assert their sovereign rights and cultural connection to the Everglades, including signing a co-stewardship agreement with the National Park Service that acknowledges their deep ancestral ties to the land and provides a framework for collaborative management of resources within the park ^[6]. Both the Seminole Tribe of Florida and the Miccosukee Tribe maintain reservations adjacent to the park and remain actively engaged in issues affecting the Everglades ecosystem that has sustained their communities for generations.

The movement to protect the Everglades as a national park originated in the early twentieth century, beginning with the establishment of Royal Palm State Park in 1916 as Florida's first state park, dedicated to protecting the 4,000-acre Paradise Key hammock that would later become a nucleus of the national park ^[1]. National Park Service Director Stephen T. Mather recommended in 1923 that "there should be an untouched example of the Everglades of Florida established as a national park," setting in motion decades of advocacy, political maneuvering, and land acquisition that would eventually create one of America's most ecologically significant protected areas. The early conservation impulse was driven in part by alarm over the rapid destruction of rare wildlife and orchids in the Everglades, as plume hunters had nearly exterminated wading bird colonies to supply feathers for the fashion industry, and plant collectors were stripping the landscape of its native orchids and bromeliads.

Ernest F. Coe, a Yale-educated landscape architect who moved to Miami in 1925, became the tireless champion of the park effort, earning himself the title "Father of the Everglades" ^[2]. In 1928, Coe wrote to Director Mather proposing a national park in the lower Everglades and established the Tropical Everglades National Park Association that same year to build political and public support for the initiative. His lobbying bore fruit when Senator Duncan B. Fletcher introduced legislation in December 1928, and the following year Congress authorized a feasibility investigation. A special inspection committee that included NPS Director Horace Albright, Assistant Director Arno B. Cammerer, and Yellowstone superintendent Roger Toll toured the area and confirmed its suitability, while locally Dr. David Fairchild, former head of the USDA's Bureau of Plant Exploration, served as the first president of the park association and U.S. Representative Ruth Bryan Owen of Miami championed the cause in Congress ^[1].

On May 30, 1934, Congress passed an act authorizing the creation of Everglades National Park over 2,164,480 acres, to be acquired through public or private donation, though the legislation included a rider ensuring no federal money would be allotted for at least five years ^[1]. The Great Depression, World War II, and the difficulty of acquiring private land holdings delayed the park's establishment for thirteen years. Florida eventually appropriated two million dollars in 1946 for the purchase of private lands, and the State Federation of Women's Clubs donated Royal Palm State Park to the federal government. President Harry S. Truman formally dedicated Everglades National Park on December 6, 1947, in a ceremony at Everglades City, making it the first national park established specifically to preserve a biological ecosystem rather than scenic or geological wonders ^[1]. Notably, Coe was bitterly disappointed in the final boundaries, which were considerably smaller than his original vision and excluded Big Cypress, Key Largo, and other areas he considered ecologically essential.

Marjory Stoneman Douglas, a journalist, author, and women's suffrage advocate, published her groundbreaking book "The Everglades: River of Grass" in 1947, the same year the park was dedicated, fundamentally reshaping public perception of the Everglades from a worthless swamp into a treasured ecological wonder ^[3]. Douglas had spent five years researching the ecosystem, consulting with Garald Parker of the U.S. Geological Survey, and her characterization of the Everglades as a river became the enduring metaphor for the region. By the 1950s, she directed her advocacy against the U.S. Army Corps of Engineers for degrading wetlands through canal, levee, dam, and pump station construction, recognizing the Everglades as an interconnected system dependent on water flow from Lake Okeechobee and the Kissimmee River. In 1970, she founded the Friends of the Everglades to build political support for conservation, and she continued her activist work until her death in 1998 at the age of 108 ^[4].

The park accumulated significant international recognition in the decades following its establishment: it was designated an International Biosphere Reserve on October 26, 1976, a UNESCO World Heritage Site on October 24, 1979, and a Wetland of International Importance under the Ramsar Convention on June 4, 1987 ^[5]. On November 10, 1978, approximately 86 percent of the park was declared a federal wilderness area, later renamed the Marjory Stoneman Douglas Wilderness in 1997 in honor of the park's most prominent champion ^[6]. The park was expanded multiple times, most recently in 1989, though it was also placed on UNESCO's World Heritage in Danger list from 1993 to 2007 and again from 2010 onward due to ongoing degradation of its water systems, underscoring the persistent challenges facing one of America's most important natural areas ^[7]. Hurricane Andrew caused catastrophic damage to the park in 1992, destroying visitor facilities and devastating hammock forests, though subsequent recovery demonstrated the resilience of the Everglades ecosystem when allowed to recover naturally. The Ernest F. Coe Visitor Center was dedicated on December 6, 1996, honoring the man who devoted his final decades to creating the park before his death on January 1, 1951, at the age of 84 ^[2].

Everglades National Park offers a distinctive array of trails and attractions that differ markedly from the mountainous hiking typical of western national parks, instead emphasizing boardwalks through wetlands, paddling routes through mangrove wilderness, and scenic drives across the flat subtropical landscape ^[1]. The park's three separate entrance areas, accessible from Homestead, Shark Valley, and Everglades City, do not connect by road within the park, requiring visitors to plan their experience around one of these distinct gateway regions. This disconnected geography means that exploring the full range of the park's attractions requires multiple trips or a multi-day itinerary that accounts for the driving time between entrances on public roads outside the park.

The Anhinga Trail, located at the Royal Palm area four miles from the main Ernest Coe entrance, is widely regarded as the park's premier wildlife viewing experience and one of the most popular trails in the entire national park system ^[2]. This wheelchair-accessible, 0.8-mile round-trip boardwalk and paved pathway winds through a sawgrass marsh and freshwater slough, offering remarkably close encounters with alligators, turtles, anhingas, great blue herons, great egrets, and dozens of other bird species, particularly during the winter dry season when lower water levels concentrate aquatic wildlife in the remaining pools. The adjacent Gumbo Limbo Trail, also accessible from the Royal Palm area, leads through a shaded tropical hardwood hammock draped with ferns and air plants, providing a striking ecological contrast to the open marsh of the Anhinga Trail just a short walk away.

Shark Valley, located along the Tamiami Trail on the park's northern boundary, features a flat, paved 15-mile loop road used for tram rides, bicycling, and walking through the heart of the Everglades freshwater marsh ^[3]. At the halfway point of the loop stands the Shark Valley Observation Tower, a 45-foot structure that provides the highest vantage point accessible by foot in the entire park, offering panoramic views extending up to 20 miles across the seemingly endless river of grass. Visitors can explore the loop via guided tram tours operated by the Shark Valley Tram Tour Company, rent bicycles for a self-guided ride, or walk portions of the paved road, with alligators, herons, egrets, deer, turtles, and the rare Everglade snail kite frequently spotted along the route. Two additional trails at Shark Valley, the Bobcat Boardwalk through sawgrass and hardwood forest and the Otter Cave Hammock Trail along a rough limestone path through tropical hardwood forest, offer shorter immersive experiences away from the main loop ^[3].

The Pa-hay-okee Overlook Trail, a short 0.2-mile boardwalk accessible from the main park road between the Coe entrance and Flamingo, takes its name from the Miccosukee word for the Everglades, meaning "grassy waters" ^[1]. This elevated platform provides sweeping views of the vast sawgrass prairie that characterizes the park's interior, particularly spectacular at sunrise and sunset when flocks of wading birds cross the sky. Further south along the main park road, the Mahogany Hammock Trail leads visitors along a boardwalk through a dense tropical hardwood hammock that contains one of the largest living mahogany trees in the United States, while the Pinelands Trail offers a 0.4-mile loop through the park's fire-dependent pine rockland ecosystem where slash pines tower above an understory of palmettos, wildflowers, and endemic plant species.

The 99-mile Wilderness Waterway, connecting Flamingo at the park's southern tip to Everglades City on the Gulf Coast, stands as one of the most remarkable paddling routes in North America, threading through an intricate maze of mangrove-lined creeks, rivers, lakes, and inner bays within the Marjory Stoneman Douglas Wilderness ^[4]. Most paddlers allow at least eight days to complete the full route, camping at designated ground sites, beach sites, and elevated chickee platforms along the way, and the journey is recommended exclusively for experienced paddlers due to the navigational complexity of the mangrove maze where waterways begin to look indistinguishable. The Gulf Coast entrance near Everglades City also provides access to the Ten Thousand Islands archipelago, a labyrinth of mangrove islands offering exceptional kayaking, fishing, and wildlife viewing opportunities along the park's western coastline ^[5]. The park maintains numerous shorter canoe and kayak trails throughout all three entrance areas, including the Nine Mile Pond Trail and the Hell's Bay Canoe Trail, which wind through narrow mangrove tunnels and open marshes that can only be experienced from the water.

Everglades National Park is organized around three separate entrance areas that do not connect by road within the park, each offering distinct visitor facilities and access to different ecosystems ^[1]. The main entrance near Homestead leads to the Ernest F. Coe Visitor Center and the 38-mile main park road extending south to Flamingo on Florida Bay. The Shark Valley entrance, located along the Tamiami Trail (U.S. Route 41) on the park's northern boundary, provides access to the freshwater marsh interior. The Gulf Coast entrance near Everglades City serves as the gateway to the Ten Thousand Islands and the western mangrove wilderness. Visitors should note that cell phone service is extremely limited throughout the park, and the National Park Service strongly recommends downloading maps and trip planning information before arriving.

The park operates four visitor centers, each providing maps, orientation information, exhibits, restrooms, and ranger guidance ^[1]. The Ernest F. Coe Visitor Center, located at the main entrance near Homestead, offers natural history exhibits and serves as the primary orientation point for visitors entering from the east. The Guy Bradley Visitor Center at Flamingo provides trip planning assistance for visitors exploring the southern reaches of the park and Florida Bay. The Shark Valley Visitor Center offers exhibits and information about the freshwater Everglades, while the Marjory Stoneman Douglas Visitor Center near Everglades City, which underwent a major renovation with a ribbon-cutting ceremony held in December 2024, serves visitors accessing the Gulf Coast district (as of 2025) ^[2].

Entrance fees as of January 2024 are $35 per private vehicle for a seven-day pass covering the driver and all passengers, $30 per motorcycle admitting up to two motorcycles with four total passengers, and $20 per person for hikers, bicyclists, and paddlers, with children 15 and under admitted free ^[3]. An Everglades Annual Pass costs $70 for 12 months of unlimited visits (as of 2024). The park also charges a nonresident fee of $100 per person aged 16 and older for non-U.S. citizens and residents, in addition to standard entrance fees (as of 2024). Digital passes or credit and debit cards are the only accepted methods of payment at fee collection areas; the park does not accept cash. Free entrance days are offered on select dates throughout the year, including Presidents Day, Memorial Day, the NPS birthday on August 25, and Veterans Day (as of 2026) ^[3].

The park provides two frontcountry campgrounds accessible by vehicle: Flamingo Campground at the southern tip of the park on Florida Bay, and Long Pine Key Campground located along the main park road amid the pine rockland ecosystem ^[4]. Both campgrounds can be reserved through Flamingo Adventures, the park's authorized concessioner. For wilderness camping within the Marjory Stoneman Douglas Wilderness, the park maintains a network of ground sites, beach sites, and elevated camping platforms known as chickees, which are raised wooden platforms with roofs measuring 10 by 12 feet and built to accommodate a maximum of six people. As of January 2, 2023, all wilderness campsites require advance reservations through Recreation.gov, with reservations opening 90 days in advance and wilderness permits costing $23 (as of 2025); walk-up sites are no longer available ^[4].

Guided experiences include tram tours at Shark Valley operated by the Shark Valley Tram Tour Company, which provides narrated rides along the 15-mile loop road with stops at the observation tower, and boat tours departing from both the Flamingo and Gulf Coast areas ^[5]. Bicycle rentals are available at Shark Valley for visitors who prefer to explore the loop road at their own pace. The park is accessible from Miami via Florida's Turnpike and State Road 9336 to the Homestead entrance, from Miami via U.S. Route 41 (Tamiami Trail) to the Shark Valley entrance, and from Naples via U.S. Route 41 and State Road 29 to the Everglades City entrance. The nearest major airports are Miami International Airport, approximately 45 miles from the main entrance, and Southwest Florida International Airport near Fort Myers for Gulf Coast access. Preparation is emphasized as critical for a successful visit, as the park's remote character, extreme heat, intense sun exposure, and vast populations of mosquitoes during the wet season can challenge unprepared visitors ^[4].

Everglades National Park faces a constellation of interconnected conservation challenges that have placed it on UNESCO's World Heritage in Danger list twice, from 1993 to 2007 and again from 2010 to the present, making it one of the most threatened major protected areas in the United States ^[1]. The fundamental threat to the Everglades has always been the disruption of its natural water flow, beginning with the first drainage canals constructed in 1906 and escalating dramatically after Congress authorized the Central and Southern Florida Flood Control Project in 1948, which built 1,400 miles of canals, levees, and water control devices that divided the Everglades into managed basins and severed the historic sheet flow from Lake Okeechobee to Florida Bay ^[2]. Between 1952 and 1954, a levee 100 miles long was constructed between the eastern Everglades and the growing suburbs from Palm Beach to Homestead, permanently blocking the natural westward flow of water into the park and establishing the engineered hydrology that continues to govern water delivery to this day.

The consequences of this hydrological disruption have been severe and far-reaching ^[3]. The original Everglades ecosystem covered approximately 4,000 square miles, but the park now protects only the southern 20 percent of that historic footprint, with the remainder converted to agriculture, urban development, and managed water conservation areas. Altered water timing and volumes have devastated wading bird populations, which declined from an estimated 265,000 nesting pairs in the 1930s to fewer than 25,000 by the late twentieth century, as the birds depend on predictable seasonal drying to concentrate their prey in shrinking pools. In the 1930s, a combination of the Hoover Dike preventing water from leaving Lake Okeechobee and drainage canals removing water from the landscape caused the Everglades to become so parched that peat turned to dust, and in 1939 approximately one million acres of Everglades burned in catastrophic wildfires.

The Comprehensive Everglades Restoration Plan (CERP), authorized by Congress in 2000 at a projected cost exceeding $10.5 billion, represents the largest hydrologic restoration project ever undertaken in the United States ^[4]. This federal-state partnership aims to restore, preserve, and protect the south Florida ecosystem while maintaining water supply and flood protection for the region's growing population, with a projected timeline of 35 or more years for full implementation. The South Florida Natural Resources Center plays a critical role in ensuring that National Park Service mission priorities guide CERP decision-making for Everglades and Biscayne National Parks and Big Cypress National Preserve. The Central Everglades Planning Project, described as a fast-track planning effort for the next generation of restoration, focuses on increasing the flow of fresh, clean water into the central and southern Everglades, though progress has been slower than originally envisioned due to funding constraints, political challenges, and the sheer complexity of re-engineering a water management system that serves eight million residents ^[4].

Invasive species represent a second existential threat to the park's ecology, with the Burmese python crisis standing as the most dramatic example ^[5]. Established through the accidental or intentional release of captive pet animals, conservatively tens of thousands of these massive constrictors now inhabit more than a thousand square miles of southern Florida, and their cryptic coloring and behavior makes population estimation and removal extraordinarily difficult ^[6]. Park officials and the USGS have invested over a decade investigating removal methods, including an authorized agent program that actively removes pythons from the park, and research into emerging technologies such as genetic biocontrol. On the botanical front, invasive plants including Australian pine, old world climbing fern, melaleuca, Brazilian pepper, and seaside mahoe spread rapidly through the park, displacing native vegetation and altering habitat structure, with plant invasions recognized as the second greatest threat to native species after direct habitat destruction ^[7].

Climate change compounds every other conservation challenge facing the Everglades, as the park's nearly flat topography and coastal position make it uniquely vulnerable to sea level rise ^[8]. Saltwater intrusion into freshwater marshes is already observable on the landscape, pushing mangrove forests inland and reducing the extent of freshwater habitat that sawgrass, wading birds, and the endangered Cape Sable seaside sparrow depend upon. The park's conservation successes, however, demonstrate that sustained effort can yield meaningful results: the American crocodile was reclassified from endangered to threatened in 2007 after its population recovered to approximately 2,000 individuals in Florida, with roughly 100 nests recorded annually in the Everglades and Biscayne National Parks ^[9]. Scientists now use the American crocodile as a bioindicator of hydrologic restoration, hypothesizing that improved freshwater flow will further enhance crocodile growth, survival, and population density throughout the park, providing a living metric for the success of the broader restoration effort that aims to return this singular ecosystem to a semblance of its former ecological grandeur.