Jalapão

Jalapão State Park is a protected area covering approximately 158,971 hectares in the eastern portion of Tocantins state, central Brazil, within the Jalapão region — a vast Cerrado landscape in the interior of the continent. ^[1] The park is the core protected area within the broader Jalapão mosaic, which encompasses multiple overlapping federal and state conservation units totaling nearly 1 million hectares. Jalapão is celebrated for its extraordinary landscapes of golden sand dunes, crystal-clear cold springs (fervedouros), and vast campos limpos grasslands interspersed with gallery forests and veredas (palm swamps). The region represents one of the last large intact Cerrado landscapes in Brazil.

Jalapão is one of the most significant refugia for Cerrado wildlife in Brazil, with documented populations of giant anteaters, giant armadillos, maned wolves, tapirs, marsh deer, and pampas deer. ^[1] Jaguars are present and the region is considered one of the important remaining jaguar strongholds in the central Brazilian Cerrado. The giant river otter inhabits the Rio Novo, Rio Sono, and other clear-water rivers within the park. The bird community is exceptionally rich with over 400 species recorded. Critically endangered Brazilian mergansers (Mergus octosetaceus) have been recorded on the Rio Novo, making Jalapão one of the last strongholds for this rare endemic waterfowl. ^[2] The fervedouros support specialized aquatic invertebrate communities.

Jalapão's vegetation is a textbook representation of the major Cerrado physiognomies in a single landscape. Campo limpo (open grassland without trees), campo cerrado (grassland with scattered shrubs), cerrado sensu stricto (savanna with scattered trees), cerradão (dense woodland), and veredas (Mauritia flexuosa palm swamps along watercourses) form a mosaic shaped by soil type, drainage, and fire history. ^[1] The sandy soils of the dune fields support a distinct flora of sparse, drought-adapted plants while the gallery forests along the rivers contain a more diverse tree community. The veredas are particularly biodiverse habitats supporting endemic and threatened plant species including rare orchids and Eriocaulaceae (button flowers). Buriti palm (Mauritia flexuosa) is the ecological and cultural symbol of the Jalapão.

The Jalapão landscape is shaped by the interplay of ancient sedimentary rocks and active aeolian (wind) processes on the Tocantins-Piauí divide. The region sits atop the Urucuia aquifer, one of the largest underground water reservoirs in Brazil, fed by Cretaceous sandstone of the Urucuia Formation deposited as desert dunes approximately 100 million years ago. ^[1] These ancient lithified dunes now weather to produce the characteristically pale sandy soils and active sand dunes of the Jalapão. The fervedouros (natural springs) form where water percolating through the porous Urucuia sandstone emerges under artesian pressure through fractures, creating pools where the upwelling force keeps bathers at the surface. The Rio Novo canyon carves through sandstone and quartzite layers to create spectacular rapids and waterfalls.

Jalapão experiences a tropical wet-dry climate with an intense dry season from May to September and a rainy season from October to April. Annual rainfall averages 1,500–1,700 mm, highly concentrated in the wet season. During the dry season, temperatures frequently exceed 38°C and the grasslands become tinder-dry, making fire a dominant ecological process. The dry season corresponds to the peak tourism period, as rivers become accessible by 4WD vehicles and trails are easier to navigate. The wet season brings spectacular green landscapes but makes most access routes impassable. Humidity drops dramatically during the dry season, and fine dust from the sandy soils can affect air quality in the open grassland areas during windy periods.

The Jalapão region was inhabited by diverse indigenous peoples including the Xerente and Avá-Canoeiro, who used the gallery forests and cerrado for hunting and gathering. The vast, trackless interior of the Tocantins cerrado was one of the last regions of Brazil to experience intensive European colonization, with settlement proceeding slowly through the 18th and 19th centuries along the river valleys. Quilombola communities — descendants of escaped enslaved Africans — established themselves in remote locations across the Jalapão region and several recognized quilombola territories remain today. Traditional extraction of the golden capim-dourado grass (Syngonanthus nitens) for artisanal crafts has been practiced by local communities for generations and represents a culturally significant sustainable land use. ^[1]

Jalapão State Park was established by the Tocantins state government on 12 January 2001, recognizing the national and international significance of the Jalapão landscape. ^[1] The park creation was preceded by intensive scientific survey work documenting the region's biodiversity and the risks posed by expanding cattle ranching and uncontrolled tourism. The Tocantins state government established the park as the anchor unit of a broader conservation mosaic that includes the federal Serra Geral do Tocantins Ecological Station and several extractivist reserves that accommodate quilombola and traditional communities. The creation of the park sparked a tourism boom that has brought both economic benefits and management challenges to the region.

Jalapão's most iconic attractions are the fervedouros — natural artesian springs where visitors float in crystal-clear cold water over white sand beds, kept buoyant by upwelling pressure from the Urucuia aquifer beneath. ^[1] Fervedouro 1 near the entrance is the most visited; others deeper in the park offer a more secluded experience amid native vegetation. Cachoeira da Velha on the Rio Novo is one of the most spectacular waterfalls in central Brazil, approximately 100 meters wide and 15 meters high. ^[2] The active sand dunes near the Rio Novo allow sandboarding and panoramic views across the Cerrado. Guided visits to capim-dourado craft communities and walks through buriti palm veredas complete the park's offering.

Access to Jalapão is primarily by 4WD vehicle from the city of Palmas (Tocantins capital), approximately 300 kilometers to the west via TO-010 and connecting unpaved roads that require 4WD during the dry season and are often impassable in the wet season. ^[1] The small town of Mateiros is the gateway community for the park, with basic pousadas, restaurants, and guided tour operators. A network of licensed local guides is mandatory for most park attractions and ensures visitor safety in a remote environment. São Félix do Tocantins is another access point for the northern section of the park. Palmas offers the nearest commercial airport.

The primary threats to Jalapão are uncontrolled wildfire during the dry season, excessive tourism at popular springs causing erosion and water quality degradation, and the expansion of large-scale soybean farming on the Cerrado plateaus surrounding the protected area mosaic. ^[1] Fires set for cattle pasture management regularly escape onto protected land, burning vast areas of native cerrado annually. ICMBio and the Tocantins state government have implemented an integrated fire management program using community-based controlled burning to reduce wildfire risk. The fervedouros require strict visitor number limits to prevent physical damage to the fragile sandy spring beds from foot traffic and contamination from sunscreen and personal care products.