Alto del Nudo

Serranía Alto del Nudo is a protected area in the department of Risaralda, Colombia, located on the western flank of the Cordillera Central in the heart of the country’s Coffee Cultural Landscape (Eje Cafetero). ^[1] Established in 1992 and covering roughly 2,626 hectares (about 26 square kilometres), the park is administered by CARDER, Risaralda’s regional environmental authority, in partnership with FECOMAR, a federation of more than 22 community organisations. ^[2] It straddles the municipalities of Dosquebradas, Santa Rosa de Cabal, Marsella and Pereira, taking its name from the mountainous nudo (knot) that forms the divide between the Otún, Campoalegre and San Francisco river basins. ^[3] Originally declared a Regional Natural Park, the area was reclassified under Decree 2372 of 2010 as a Distrito de Conservación de Suelos (Soil Conservation District). The reserve’s principal purpose is to protect sub-Andean and Andean montane forest and the watersheds — including the quebradas La Churria, La Fría, La Independencia, Las Hortensias and Las Minas — that supply drinking water to the municipal aqueducts of Dosquebradas and Santa Rosa de Cabal. ^[3]

As a remnant of montane forest on the Cordillera Central, Serranía Alto del Nudo provides habitat for the wildlife typical of the central Colombian Andes. The reserve supports at least 71 recorded bird species, including tanagers, hummingbirds and other forest passerines. ^[1] Mammals present include ocelot, coati, armadillo, giant anteater, mountain fox and tayra, reflecting the Andean forest community of this elevation band. ^[2] The park’s value for fauna lies largely in maintaining forest cover and connectivity across an agricultural and coffee-growing landscape, where such relatively undisturbed habitat is increasingly scarce. Because the reserve is small and surrounded by settled land, its animal populations depend on the protection of the remaining forest patches and riparian corridors.

The vegetation of Serranía Alto del Nudo is dominated by sub-Andean and Andean montane forest at elevations between roughly 1,700 and 2,100 metres. ^[1] Forested slopes support a mix of trees including nogal, balso, guamo, yarumo, siete cueros and encenillo, alongside ferns, epiphytes, mosses and bromeliads characteristic of humid Andean woodland. ^[2] Some areas reflect a history of clearing for pasture and coffee cultivation and are in various stages of natural regeneration or assisted reforestation. Protecting and recovering this forest cover is central to the reserve’s role, since the vegetation stabilises steep terrain and regulates the flow of the streams that feed the surrounding aqueducts.

Serranía Alto del Nudo lies on the western slope of the Cordillera Central, the central and geologically oldest of the three Andean ranges that traverse Colombia. The terrain is steep and dissected, forming a mountainous divide — the nudo — that separates adjoining river basins at elevations of approximately 1,700 to 2,100 metres above sea level. ^[1] The high relief, humid climate and erodible Andean soils combine to make slope stability and erosion control important management concerns. The same rugged topography that gives the serranía its name is what allows it to function as a water tower, gathering rainfall and channeling it into the headwater streams of the Otún, Campoalegre and San Francisco catchments below. ^[2]

The reserve has a humid tropical mountain climate moderated by elevation, typical of the mid-altitude slopes of the Cordillera Central in the Eje Cafetero. Elevations range from approximately 1,700 to 2,100 metres, yielding mild and relatively stable temperatures through the year, while rainfall follows a bimodal pattern with wetter periods generally around April–May and October–November. ^[1] Frequent cloud cover, mist and high humidity are characteristic of these montane forests. This consistent moisture is precisely what makes the area valuable as a watershed, sustaining the year-round streamflow on which the downstream aqueducts of Dosquebradas and Santa Rosa de Cabal depend.

The lands around Serranía Alto del Nudo lie within Colombia’s Coffee Cultural Landscape, a UNESCO World Heritage region shaped over the past century and a half by Antioquian colonisation and the spread of smallholder coffee farming across the slopes of the Cordillera Central. ^[1] The municipalities the park straddles — Dosquebradas, Santa Rosa de Cabal, Marsella and Pereira — grew within this coffee economy, and their expansion progressively cleared and fragmented the surrounding montane forests. The area also carries a Quimbaya indigenous heritage: local features and trails bear the name of Cacique Noó, an indigenous leader of the pre-Columbian Quimbaya culture that once settled these slopes. ^[2] As nearby urban centres such as Pereira and Dosquebradas grew, securing reliable water supplies from the mountain headwaters became a pressing concern, which in turn motivated efforts to protect the remaining forest of the serranía.

Serranía Alto del Nudo was created in 1992 to safeguard the montane forest and watersheds of the divide between major river basins that had come under pressure from agricultural expansion and growing urban water demand. ^[1] Spanning roughly 2,626 hectares across four municipalities of Risaralda, it was managed under CARDER as a regional protected area focused on watershed protection and forest conservation. In 2011, under Decree 2372 of 2010, the area was formally reclassified as a Distrito de Conservación de Suelos (Soil Conservation District), a category that recognises multi-use landscapes where conservation, agriculture and rural communities coexist. ^[1] CARDER adopted an updated management plan in 2021 covering the 2021–2026 period. ^[2]

The main draws of Serranía Alto del Nudo are its montane forest, panoramic views over the Eje Cafetero, and the Cascada La Aguadita, a waterfall in a particularly undisturbed sector of the reserve accessible along the Aguadita river route. ^[1] The park has two marked ecological trails: the Cacique Noóná trail (approximately 4 km) and the Palosanto trail, both passing through regenerating and mature forest and offering viewpoints across Dosquebradas and Pereira. ^[2] As a regional reserve close to Pereira and Dosquebradas, it is used for hiking, nature observation and environmental education. Visitors should treat trail conditions and access as variable and confirm details locally, since facilities are modest.

Serranía Alto del Nudo is accessible from the Pereira–Dosquebradas metropolitan area; local buses from Pereira take approximately 1.5 hours to the reserve entrance. ^[1] The reserve has a visitor centre at Las Hortensias with lodging capacity for approximately 22–24 people, as well as food service and camping areas. ^[2] Management is carried out through an agreement between CARDER and FECOMAR, which groups more than 22 community organisations that provide guiding and other ecotourism services. Visitors should come prepared for a humid mountain climate, steep terrain and changeable weather.

Conservation at Serranía Alto del Nudo centres on protecting the montane forest and the watersheds — including quebradas La Churria, La Fría, La Independencia, Las Hortensias and Las Minas — that supply the aqueducts of Dosquebradas and Santa Rosa de Cabal, making clean water provision for approximately 57,000 residents across 28 community aqueducts the reserve’s defining ecosystem service. ^[1] Management by CARDER, in partnership with FECOMAR, emphasises maintaining and recovering forest cover, controlling erosion on steep slopes, and sustaining the connectivity of forest and riparian corridors across a heavily settled, coffee-growing landscape. Because the reserve is small and surrounded by agriculture and expanding towns, its long-term value depends on reforestation, careful land-use management in the surrounding municipalities, and the involvement of local communities who benefit directly from the water and forest the serranía protects. ^[2]