Pasochoa

Pasochoa Wildlife Refuge is a protected area of approximately 500 hectares located in Pichincha Province, Ecuador, just 45 minutes south of Quito near the town of Uyumbicho in the Mejía canton. Managed by the Ecuadorian Ministry of Environment and administered in partnership with the Fundación Natura, the refuge protects one of the last intact remnants of the original Andean cloud forest that once covered the inter-Andean valley of Pichincha. The protected area surrounds the collapsed caldera of the extinct Pasochoa volcano, whose crater walls shelter an exceptionally well-preserved relict forest. The refuge harbors over 120 bird species, 240+ plant species, and a remarkable diversity of Andean cloud forest life within a small, easily accessible area. Its proximity to Quito makes it one of the most visited protected natural areas in the Ecuadorian highlands, popular for day hiking, birdwatching, and environmental education.

Pasochoa Wildlife Refuge is one of Ecuador's premier birdwatching destinations, with over 120 bird species recorded within its compact forest. The refuge is especially celebrated for its 16 species of hummingbirds, including the sword-billed hummingbird (Ensifera ensifera) — the species with the longest bill relative to body size of any bird — as well as the Andean emerald, sparkling violetear, and rainbow-bearded thornbill. Andean condors (Vultur gryphus) soar above the crater rim, and mountain turkeys (Penelope montagnii), Andean guans, and various tanagers and flycatchers inhabit the forest interior. Mammals within the refuge include white-tailed deer (Odocoileus virginianus), pumas, and the Andean spectacled bear (Tremarctos ornatus), though sightings of the larger predators are rare. The dense undergrowth shelters small rodents, lizards, and an array of amphibians endemic to the Ecuadorian Andes. The forest's intact canopy and absence of agricultural disturbance within the caldera make it a critical wildlife refuge in an otherwise heavily fragmented landscape.

The forest of Pasochoa represents the last significant relic of the original cloud forest that historically blanketed the inter-Andean valley between Quito and Latacunga. The caldera's protected microclimate — with persistent morning mist, high humidity, and shelter from wind — has allowed this cloud forest to survive while the surrounding landscape was cleared for agriculture over centuries. The forest is characterized by tall, moss-draped trees including species of Podocarpus (native Andean conifers), Clusia, Weinmannia, and Miconia, draped with bromeliads, orchids, ferns, and mosses at every height. Wax palms (Ceroxylon species), among the tallest palms in the world, grow at the upper elevation boundaries of the refuge, forming a distinctive silhouette above the cloud forest canopy. Over 240 plant species have been documented, including numerous orchid species and epiphytes that thrive in the permanently moist conditions. The dense bamboo (Chusquea) understory provides habitat for wrens and other secretive bird species.

Pasochoa is an extinct composite volcano located on the eastern flank of the Western Cordillera of the Ecuadorian Andes, rising to approximately 4,200 meters at its highest point. The volcano underwent a catastrophic eruption in prehistoric times that collapsed its summit crater and left the distinctive caldera now sheltering the cloud forest. The caldera walls, rising steeply above the forest floor, have protected the forest from the drying winds and agricultural conversion that eliminated similar vegetation across the valley. The surrounding terrain is composed of volcanic ash deposits, lava flows, and pyroclastic materials typical of the highly active Ecuadorian volcanic arc. The Pasochoa caldera is sometimes described as a 'dead crater' — its last significant eruptive activity predates human settlement, leaving only the geomorphological signature of its violent past. The rich volcanic soils within and around the refuge support the extraordinary plant diversity characteristic of Andean cloud forests.

Pasochoa Wildlife Refuge experiences an equatorial Andean climate with temperatures that remain relatively stable year-round due to its location near the equator, typically ranging from 6°C to 18°C at the forest floor level. The cloud forest receives abundant moisture year-round, with persistent fog and mist covering the caldera for several hours each day — the condensation of which is a critical water source for the forest ecosystem. Ecuador's Andean highlands have two 'wet' and two 'dry' seasons determined by the position of the Intertropical Convergence Zone: the main rainy season runs from October through May, and a shorter wet period occurs in June–July, while the driest months are August and September. The elevation range of the refuge (roughly 2,700 to 4,200 meters) creates significant variation in temperature and precipitation with altitude. Visitors should be prepared for sudden mist, rain, and cold at any time, and should carry warm layers and waterproof clothing even during the dry season.

The inter-Andean valley of Pichincha has been inhabited for thousands of years, first by pre-Inca cultures and then by the Inca Empire, which incorporated the Quito region around 1500 CE. The indigenous Quitu-Cara people left traces of their occupation throughout the valley, and the rich agricultural soils of the Andean basin were intensively farmed under both indigenous and colonial land management. Spanish colonization from the 1530s onward transformed the landscape dramatically: the colonial hacienda system concentrated land ownership and led to the progressive clearing of native forests for cattle pasture and crops. The forest of Pasochoa survived primarily because the steep caldera walls made the land less suitable for agriculture. In the 20th century, increased population pressure in the Quito metropolitan region intensified threats to remaining forest fragments, ultimately motivating conservation NGOs and the government to formally protect the Pasochoa forest.

Pasochoa Wildlife Refuge was established in the 1980s through an initiative by Fundación Natura, Ecuador's oldest environmental NGO, which recognized the Pasochoa forest as one of the last intact examples of the native Andean valley cloud forest. The Fundación Natura purchased and managed the land before coordinating with Ecuador's Ministry of Environment for its formal designation as a Wildlife Refuge within the Sistema Nacional de Áreas Protegidas (SNAP). The refuge was developed with an emphasis on environmental education and ecotourism, and Fundación Natura has maintained a visible presence managing visitor services and conducting ecological monitoring. Trail infrastructure, interpretation centers, and a campsite were developed to make the refuge accessible as an educational destination. Over the decades since establishment, the refuge has served as an important research site for Andean ecology and as a model for private-public conservation partnerships in Ecuador.

The refuge offers six marked hiking trails of varying difficulty, making it suitable for a range of visitors. The shortest is the Hummingbird Trail (Sendero del Colibrí), a 900-meter self-guided loop that passes through prime hummingbird habitat near the forest edge and is ideal for families and first-time visitors. The Wax Palm Trail (Sendero de la Palma de Cera) is the most demanding at 8 kilometers, ascending to the upper forest boundary where wax palms tower above the cloud forest and views of the caldera rim are spectacular. Several intermediate trails of 2–5 kilometers wind through the densest sections of the old-growth forest, passing moss-draped trees, bromeliads, and bamboo groves. The summit of Pasochoa volcano (4,200 m) can be reached by experienced hikers and offers panoramic views of the inter-Andean valley, including the flanks of Cotopaxi to the south on clear days. Birdwatching at dawn is a highlight, when the forest fills with hummingbird activity and the songs of tanagers, wrens, and flycatchers.

The refuge is located approximately 45 minutes by road south of Quito, near the town of Uyumbicho in Mejía canton, making it one of the most easily reached natural areas from the capital. Visitors can reach the refuge by taking a bus from Quito toward Amaguaña and then a short taxi ride, or via private vehicle. Fundación Natura operates the visitor center at the entrance, where admission fees are collected and trail maps and interpretive materials are available. The visitor center includes toilets and a picnic area. Overnight camping is permitted at a designated campsite within the refuge, allowing visitors to experience dawn birdwatching when activity peaks. Guided tours for groups and schools are available through Fundación Natura. Visitors should bring warm, waterproof clothing, sturdy hiking shoes, and insect repellent. A small café near the entrance provides basic refreshments. The closest town with full services is Amaguaña.

The primary conservation mission of Pasochoa Wildlife Refuge is to protect the last remnant of the native Andean inter-valley cloud forest in Pichincha Province, which has been reduced to less than 1% of its original extent due to agricultural conversion. Fundación Natura has implemented active reforestation programs using native tree species to expand the forest beyond the original caldera boundaries, gradually restoring degraded areas on the caldera flanks. Monitoring programs track bird populations, orchid diversity, and the status of large mammals including pumas and spectacled bears. The refuge serves as a critical connectivity node in an otherwise fragmented landscape, and conservation planning efforts aim to establish ecological corridors linking Pasochoa with other Andean protected areas including the Ilinizas Ecological Reserve to the south. Invasive plant species management is an ongoing priority, as aggressive exotic grasses and shrubs threaten to encroach on the forest from surrounding agricultural land. Environmental education programs for school groups reinforce the refuge's role as both a conservation and community engagement institution.