El Texcal

El Texcal State Park is a protected natural area of approximately 900 hectares located in the municipality of Jiutepec in the state of Morelos, at the southern edge of the Mexico City metropolitan region. Formally declared a state park on February 17, 2010, El Texcal protects the last remaining fragment of native dry tropical forest and associated wetland habitats in the state of Morelos, making it irreplaceable for the conservation of regional biodiversity. The park serves as a biological corridor connecting El Tepozteco National Park to the north and Sierra Monte Negro State Reserve, facilitating the movement of wildlife across a landscape otherwise dominated by urban and agricultural land uses. Hueyapan Lake within the park was simultaneously designated a Ramsar wetland in 2010, recognizing its international importance for endemic and migratory fauna.

El Texcal is home to an exceptional diversity of wildlife relative to its small size, reflecting the park's ecological connectivity and the biodiversity-rich environment of the Balsas River Basin transitional zone. Ornithological surveys have documented 220 bird species within the park, ranging from resident woodland species to migratory songbirds passing through on their seasonal journeys. The park is a critical habitat for the carpita de Morelos (Notropis boucardi), a small freshwater fish endemic to the Hueyapan Lake system and listed as threatened on the IUCN Red List — one of the most conservation-significant vertebrates in the state of Morelos. Mammals including white-tailed deer, coyotes, armadillos, and various small rodents and bats inhabit the dry forest zones. The Ramsar-designated Hueyapan Lake supports aquatic and semi-aquatic species including herons, ducks, amphibians, and turtles, and provides critical habitat for native and migratory waterfowl.

The primary vegetation of El Texcal is selva baja caducifolia — tropical dry deciduous forest — which characterizes much of the warm, seasonally dry lower elevation zones of Morelos. This vegetation type is dominated by drought-adapted trees and shrubs that drop their leaves during the dry season from November through May, creating dramatic seasonal changes in the forest's appearance and microclimate. The park also contains aquatic and semi-aquatic vegetation communities around Hueyapan Lake, including emergent water plants, riparian shrubs, and wetland grasses that provide habitat for the endemic fish and diverse bird community. A particularly notable endemic plant is Esenbeckia vazquezii, a tree species new to science that was discovered in El Texcal in 2013 by researchers from the National Autonomous University of Mexico, highlighting the park's botanical significance. The park's transitional position between temperate and tropical vegetation zones supports a flora characteristic of both biomes.

El Texcal occupies the foothills and lower valley zone of the Morelos basin, a structural trough bounded by the volcanic ranges of the Trans-Mexican Volcanic Belt. The underlying geology consists primarily of Quaternary volcanic deposits including basaltic lava flows and alluvial materials derived from the surrounding volcanic highlands, particularly from the flanks of the Popocatépetl volcanic complex to the north. The basaltic terrain weathers to produce the thin, rocky soils typical of the lower Morelos valley, which support the drought-adapted dry forest vegetation of the park. Hueyapan Lake occupies a low-lying portion of the basin where impermeable lake sediments retain water from seasonal rainfall and subsurface springs, creating the wetland environment that supports the endemic carpita fish. The volcanic and alluvial geology of the basin contributes to the groundwater system that provides drinking water to over 200,000 residents of the Jiutepec municipality.

El Texcal experiences a warm, semi-arid climate typical of the lower Morelos valley at elevations of approximately 1,200 to 1,500 meters above sea level. Mean annual temperatures are around 20 to 24 degrees Celsius, with warm winters and hot summers moderated by the elevation relative to the Mexico City basin. The rainfall pattern is strongly seasonal, with a defined wet season from June through October when convective afternoon thunderstorms driven by Pacific and Gulf moisture deliver the bulk of the annual precipitation. The dry season from November through May brings minimal rainfall, warm sunny days, and the dramatic deciduous leaf drop that transforms the tropical dry forest into an open, skeletal landscape. This seasonal climate cycle profoundly shapes the ecology of the park, with wildlife activity, plant flowering, and bird migration all closely tied to the wet-dry rhythm of the Morelos climate.

The Morelos valley and the area around modern Jiutepec have been densely inhabited since pre-Columbian times. The Tlahuica people, a Nahua-speaking group, occupied the region before Aztec conquest in the fifteenth century, and the area remained a center of Nahua culture through the colonial period. Sugar cane cultivation was introduced by the Spanish and dominated the Morelos lowlands from the colonial era into the twentieth century, reducing much of the original dry forest to agricultural land. The region of Morelos became nationally significant during the Mexican Revolution as the birthplace of Emiliano Zapata and the Zapatista agrarian movement, which sought land redistribution for peasant communities. As urbanization expanded from Mexico City southward through the late twentieth century, the Jiutepec area was incorporated into the urban fringe, and El Texcal emerged as the last significant natural area within an otherwise suburban landscape.

El Texcal was formally established as a state park by the Morelos state government on February 17, 2010, recognizing the area as the last remnant of native flora and fauna habitats of special conservation relevance in the state. The park designation was accompanied on the same date by the Ramsar designation of Hueyapan Lake, reflecting a coordinated conservation strategy to protect both the terrestrial dry forest and the freshwater wetland ecosystem within a single protected area framework. Scientific research played a key role in building the case for protection, with university studies documenting the endemic carpita fish, the new plant species Esenbeckia vazquezii, and the 220-species bird community. The park is managed by the Morelos state Secretariat of Sustainable Development, with ongoing research partnerships with the National Autonomous University of Mexico and other Mexican academic institutions supporting conservation management.

El Texcal offers a network of walking and nature trails through the tropical dry forest and along the margins of Hueyapan Lake, providing close encounters with the park's exceptional bird community and endemic freshwater ecosystems. Birdwatching is the primary draw for naturalists, with 220 documented species including herons, ducks, raptors, and colorful neotropical songbirds accessible from the park's trail network and lake viewpoints. The dramatic seasonal transformation of the tropical dry forest — from bare-branched arid landscape in the dry season to lush green forest with seasonal flowers in the wet season — offers distinct and contrasting experiences for visitors at different times of year. The Hueyapan Lake and its associated wetland vegetation provide scenic, photogenic landscapes and accessible wildlife observation sites for families and birdwatching groups. The park's position connecting El Tepozteco National Park and the broader protected area system of northern Morelos makes it an important waypoint for hikers traversing the regional trail network.

El Texcal State Park is located in Jiutepec, approximately 15 kilometers from Cuernavaca city center and accessible by car via Highway 95 and secondary municipal roads. The park has a managed entrance with basic visitor facilities including parking, restrooms, and informational materials about the park's conservation significance and key species. A network of maintained trails through the dry forest and along the lake shore provides accessible recreation for visitors of varying fitness levels. Environmental education programs are offered for school groups from the Jiutepec and Cuernavaca area, using the park's exceptional biodiversity and endemic species as teaching subjects. Cuernavaca, the capital of Morelos, is 15 minutes away by car and provides full tourist services including hotels, restaurants, and tour operators that can arrange guided visits to the park.

Conservation at El Texcal is driven by the urgent priority of protecting the endemic carpita de Morelos fish and the broader aquatic ecosystem of Hueyapan Lake, which faces threats from urban runoff, water extraction, and the introduction of exotic fish species. The Ramsar designation of Hueyapan Lake has enabled mobilization of international conservation resources and has strengthened the legal framework for protecting the lake's water quality and hydrology. Terrestrial conservation focuses on maintaining and restoring the tropical dry forest mosaic, preventing encroachment from adjacent urban and agricultural land uses, and managing invasive plant species in the park's more disturbed zones. The discovery of the new endemic tree species Esenbeckia vazquezii in 2013 prompted an assisted reproduction program at UNAM to secure the species' survival, highlighting the ongoing scientific value of even small, fragmented protected areas. Community engagement programs work with Jiutepec residents to build local support for the park and reduce illegal dumping and fuelwood collection at the park's boundaries.