San Matías-San Carlos

San Matías-San Carlos is a 145,818-hectare Protection Forest (Bosque de Protección) in Peru's Pasco Region, established on March 20, 1987, to safeguard the forest cover on the upper watersheds of the Pichis and Palcazú rivers. Located in the districts of Huancabamba, Puerto Bermúdez, and Villa Rica within Oxapampa Province, the forest spans a dramatic elevation range from 300 to 2,250 meters, encompassing two major ecoregions: the Peruvian Yungas and the Ucayali Moist Forests. The protected area serves the dual purpose of preventing soil erosion, flooding, and landslides that threaten downstream communities and infrastructure, while also preserving the cultural heritage of the Asháninka and Yanesha indigenous communities who have inhabited the forest for generations. San Matías-San Carlos forms part of the larger Oxapampa-Asháninka-Yánesha UNESCO Biosphere Reserve, functioning as a vital highland corridor within the broader Amazonian ecosystem.

The forest's nearly 2,000-meter elevation range creates a remarkable gradient of habitats supporting diverse wildlife communities. The spectacled bear (Tremarctos ornatus), South America's only bear species, inhabits the upper montane forests and is the area's most iconic mammal. The northern pudú (Pudu mephistophiles), the world's smallest deer, finds refuge in the dense undergrowth of the cloud forest zone. Woolly monkeys swing through the mid-elevation canopy, while other primates and mammals populate the diverse forest strata. The avifauna is spectacular, headlined by the Andean cock-of-the-rock (Rupicola peruvianus), Peru's national bird, whose males display their brilliant orange plumage at communal lekking sites. Crested eagles, toucans, and hundreds of other bird species have been documented across the forest's elevation zones. The lower tropical forests support tapirs, jaguars, and a rich assemblage of reptiles and amphibians, while the rivers harbor native fish species important to both the ecosystem and indigenous communities.

The forest encompasses a spectacular continuum of vegetation types, from lowland tropical rainforest at 300 meters to dense cloud forest wreathed in mist at the highest elevations. The cloud forest zones are extraordinarily rich in epiphytes, with ferns, orchids, bromeliads, and mosses festooning every available surface and creating hanging gardens on the branches of ancient trees. Valuable timber species including mahogany, tornillo (Cedrelinga cateniformis), walnut, and cedar grow in the lower and mid-elevation forests, though they are protected from commercial extraction within the reserve. Cat's claw (Uncaria tomentosa), a medicinal plant of significant cultural and economic importance to indigenous communities, is found throughout the lower forests. The canopy trees in the tropical forest zone can reach heights of 40 meters or more, creating a multi-layered forest structure that supports the area's exceptional biodiversity. Tree ferns grow in the understory of the cloud forest, and the transition between forest types creates ecotonal zones of particular botanical interest.

The Protection Forest occupies the eastern slopes of the Andes where they descend toward the Amazon Basin, a zone of dramatic topographic relief created by millions of years of tectonic uplift and river erosion. The steep terrain is underlain by a complex assemblage of sedimentary and metamorphic rocks formed during various stages of Andean mountain-building. The rivers that originate within the forest—tributaries of the Pichis and Palcazú—have carved deep valleys through the mountain flanks, exposing rock layers that chronicle the region's geological history. The steep gradients and heavy rainfall make the area highly susceptible to mass wasting events including landslides, mudflows (huaycos), and slope failures, which are precisely the hazards that the Protection Forest designation was created to mitigate by preserving forest cover. The lower elevations transition to the alluvial terraces and floodplains of the upper Amazon Basin, where river-deposited sediments create fertile soils that have attracted agricultural settlement.

The forest experiences a humid tropical to subtropical climate that varies significantly with elevation. Temperatures range from around 5°C at the highest cloud forest elevations to 32°C in the lowland tropical zones, reflecting the nearly 2,000-meter altitudinal gradient. Rainfall is abundant throughout the forest, with maximum precipitation occurring during the wet season from November through April, when heavy downpours can trigger the landslides and flooding that the forest cover is designed to prevent. Annual rainfall varies from approximately 2,000 to over 4,000 millimeters depending on elevation and aspect, with the cloud forest zones receiving additional moisture from persistent fog and cloud immersion. The humidity is generally high throughout the year, creating the perpetually moist conditions that support the luxuriant epiphyte communities and cloud forest ecosystems. The dry season from May through October brings somewhat reduced rainfall but conditions remain humid, and morning mists continue to drape the upper forest zones.

The forests of San Matías-San Carlos have been home to indigenous peoples for millennia, with the Asháninka and Yanesha communities maintaining continuous presence in the area long before European contact. These peoples developed sophisticated knowledge of the forest's resources, practicing sustainable hunting, fishing, and shifting cultivation adapted to the rainforest environment. The Asháninka, one of the largest indigenous groups in the Peruvian Amazon, have traditionally used the forest for food, medicine, building materials, and spiritual practices that are deeply intertwined with the natural world. The Yanesha people, related to the Asháninka but linguistically distinct, have similarly maintained their cultural identity through close connection to the forest ecosystem. Colonial and post-colonial periods brought waves of settlers to the region, particularly during rubber boom periods and later coffee cultivation expansion. The designation of the area as a Protection Forest in 1987 formally recognized the importance of preserving both the forest ecosystem and the cultural heritage of its indigenous inhabitants.

The Bosque de Protección San Matías-San Carlos was officially established on March 20, 1987, through Supreme Resolution No. 0101-87-AG/DGFF, making it one of Peru's designated Protection Forests—a category designed specifically to safeguard forested watersheds that protect downstream communities and infrastructure from natural hazards. The creation of the protected area recognized that the forested upper slopes of the Pichis and Palcazú watersheds were essential for preventing erosion, flooding, and landslides that threatened downstream population centers, roads, and agricultural lands. In subsequent years, the forest was incorporated into the Oxapampa-Asháninka-Yánesha Biosphere Reserve designated by UNESCO, elevating its international conservation profile and recognizing the cultural significance of its indigenous communities. The forest is managed by SERNANP (Peru's national protected areas service), which works in coordination with the indigenous communities that live within and around the protected area to balance conservation objectives with traditional land use practices.

The forest's primary attractions center on its extraordinary biodiversity and the opportunity to experience pristine Amazonian and cloud forest ecosystems. Birdwatching is exceptional, with the chance to observe the spectacular Andean cock-of-the-rock at its display leks, along with toucans, crested eagles, and hundreds of other tropical and montane species. The cloud forest zones, with their dramatic drapery of mosses, orchids, and ferns, create otherworldly landscapes that reward hikers who venture into the upper elevations. The rivers running through the forest offer scenic beauty and the possibility of encountering wildlife along their banks. Visiting the Asháninka and Yanesha communities provides cultural enrichment, with opportunities to learn about traditional forest management, medicinal plants, and indigenous crafts. The dramatic transition from tropical lowland forest to misty cloud forest can be experienced along elevation transects, showcasing the remarkable biodiversity gradient that makes the eastern Andean slopes one of the most species-rich environments on Earth.

San Matías-San Carlos Protection Forest is located in Oxapampa Province, accessible from the towns of Villa Rica and Puerto Bermúdez in the Pasco Region. Villa Rica can be reached by road from the city of Cerro de Pasco or from La Merced in the Junín Region, while Puerto Bermúdez is accessible via a more challenging road from Villa Rica. Infrastructure within the forest is minimal, and visitors should come prepared with appropriate equipment for tropical and cloud forest conditions, including rain gear, insect repellent, and sturdy footwear for muddy trails. Basic accommodation is available in the gateway towns, and arrangements for guides can be made through local community organizations. Visiting indigenous communities requires prior coordination and respect for local customs and protocols. The forest's remote location and limited infrastructure mean that trips require careful planning, but the reward is access to one of Peru's least-visited and most biodiverse protected areas. The dry season from May through October offers more accessible trail conditions, though the forest remains wet and humid year-round.

Conservation at San Matías-San Carlos faces significant challenges from deforestation, agricultural frontier expansion, and unauthorized human settlement within the protected area. Sectors such as Valle Nazarategui and Flor de Rosas have experienced encroachment, with settlers clearing forest for ginger, plantain, and coffee cultivation. The opening of new roads through and around the forest facilitates further colonization and increases the pressure on forest resources. SERNANP rangers work to monitor and patrol the vast area, but the forest's size and remote terrain make comprehensive enforcement difficult. The indigenous Asháninka and Yanesha communities serve as important allies in conservation, as their traditional land management practices and deep knowledge of the forest ecosystem contribute to monitoring and protection efforts. Climate change poses additional concerns, as altered precipitation patterns could increase the frequency of the landslides and flooding events that the forest is meant to prevent. The forest's role within the UNESCO Oxapampa-Asháninka-Yánesha Biosphere Reserve provides a framework for integrating conservation with sustainable development and indigenous rights across the broader landscape.