Aguarague National Park

Aguaragüe National Park and Integrated Management Natural Area (Parque Nacional y Área Natural de Manejo Integrado Serranía del Aguaragüe) protects the long, narrow Aguaragüe mountain range that runs north–south through the Gran Chaco province of Tarija department, in Bolivia's far south. The range forms a green, forested wall between the dry Chaco plain to the east and the sub-Andean foothills to the west, rising abruptly from the lowlands. Established in 2000, the park is above all a vital water catchment: its forested slopes capture rain and feed the springs, streams and rivers — including the Pilcomayo, which carves its famous gorge through the range — that sustain the Chaco towns of Villamontes, Yacuiba and Caraparí below.

The park's importance is ecological, hydrological and cultural. It shelters sub-Andean and Chaco-transition forest rich in wildlife, sits within a major natural-gas region (creating ongoing tensions between conservation and extraction), and overlaps the ancestral lands of Guaraní communities. For visitors it offers dramatic mountain scenery, the spectacular Pilcomayo gorge (El Angosto), forested trails, waterfalls and rivers, and birdwatching — an accessible slice of wild southern Bolivia reached from the surrounding Chaco towns rather than a developed tourist park.

The climate is hot and sub-tropical at the base, cooling and more humid on the forested ridges. The rainy season (November–March) brings the heaviest heat, humidity and full rivers, while the dry winter (May–September) is more comfortable and the best time to visit and hike. The range catches mist and rain that keep its upper slopes green. There is little tourist infrastructure inside the park; visits are typically arranged from Villamontes, Caraparí or Yacuiba.

By Car / Road

The park runs alongside the main Chaco corridor and its gateway towns. The most accessible and famous point is El Angosto del Pilcomayo, the gorge where the river cuts through the range just west of Villamontes on the Villamontes–Tarija road — reachable by a short drive or taxi from Villamontes. Other access points lie near Caraparí and Yacuiba via foothill roads. To explore the interior you generally need a high-clearance vehicle, a local guide and, in some areas, coordination with the park authority (SERNAP); roads and tracks can be rough, especially after rain.

There is no public transport inside the park. The Pilcomayo gorge can be viewed and partly explored from the roadside near Villamontes, but deeper exploration of trails, waterfalls and the forested ridges requires hiking, often with a local guide, and a vehicle to reach trailheads from the gateway towns. Arrange guides, transport and any permits in Villamontes, Caraparí or Yacuiba before setting out.

• El Angosto del Pilcomayo (Pilcomayo gorge) — the dramatic canyon where the Pilcomayo River slices through the Aguaragüe range near Villamontes; the park's signature sight, with viewpoints, the river and rugged rock walls. Reached just west of Villamontes.
• Forested ridges of the Serranía del Aguaragüe — the green, wildlife-rich sub-Andean forest cloaking the range, a striking contrast to the surrounding dry Chaco.
• Waterfalls and rivers — streams and falls descend the forested slopes, offering scenic spots within the park.
• Wildlife and birdlife — the transitional forest harbours diverse fauna and abundant birds, a draw for naturalists.

The main activities are hiking and nature exploration on the forested slopes, visiting the Pilcomayo gorge for its scenery and river, and birdwatching and wildlife-spotting in the transitional Chaco–Andean forest — best done with local guides who know the trails and access. The rivers and waterfalls offer spots to cool off, and photography of the gorge and ridges is rewarding. The park is also of interest for understanding the Chaco's water cycle and the conservation issues around gas extraction. Combine a visit with the fishing and Chaco War heritage of nearby Villamontes.

There are no restaurants inside the park, so meals are either carried in or taken in the gateway towns. For day hikes and longer treks, bring your own food and ample water. The best nearby base for eating is Villamontes, renowned for its freshwater river fish — grilled or fried sábalo and surubí from the Pilcomayo (around Bs 25–45) — as well as Chaco grilled beef and goat at its parrillas (roughly Bs 40–70). Caraparí and Yacuiba also offer simple comedores and almuerzo set lunches for around Bs 15–30 before or after a visit.

The park's streams and rivers are its lifeblood, but their water must be treated before drinking. Carry ample bottled or purified water for any visit or hike, especially given the Chaco heat. Refreshments, juices, beer and Tarija wine/singani are available in the gateway towns rather than inside the park.

• Budget: There is no developed lodging inside the park; basic alojamientos in Villamontes and the other gateway towns provide the cheapest beds from around Bs 50–120.
• Mid-range: Comfortable hotels in Villamontes (such as Eco Hotel Gota del Chaco) and the other Chaco towns, roughly Bs 200–350, serve as the practical bases for visiting the park.
• Upscale: The best rooms are in the gateway towns' top hotels (e.g. boutique hotels in Villamontes); camping within the park may be possible in some areas but requires self-sufficiency and local coordination.

There are no shops or markets inside the park, so all purchases are made in the gateway towns. Stock up on water, food and any trekking supplies in Villamontes, Caraparí or Yacuiba before entering. For souvenirs, the markets of these Chaco towns sell Guaraní woven yica bags and basketry, Chaco honey and regional produce, which make the most distinctive local buys. Bargaining is normal in the town markets; carry small bills, as there are no banking facilities in or near the park.

• Villamontes (adjacent, near the gorge) — Chaco fishing town and the main gateway.
• Caraparí (along the range) — small foothill town and access point.
• Yacuiba (south) — Argentine-border commercial city.
• Tarija (west, long mountain drive) — the wine capital and departmental seat.
• Pilcomayo gorge / El Angosto (within the park) — the scenic highlight near Villamontes.
• Entre Rios (west) — sub-Andean town toward the valley.