Reserva Natural Integral de Muniellos is Spain's largest and most pristine oak forest, renowned for its rich biodiversity and strict conservation, offering a rare glimpse into a temperate Atlantic forest ecosystem.
Located in the Principality of Asturias in northern Spain, Reserva Natural Integral de Muniellos protects approximately 5,488 hectares of ancient oak forest within the Cantabrian Mountains. Established as a strict nature reserve, it preserves one of the best examples of temperate deciduous forests in Europe, dominated by the English oak (Quercus robur) alongside a host of broadleaf species. The reserve is a core protected area of the larger Muniellos Biosphere Reserve, recognized by UNESCO. Its densely wooded valleys, rugged terrain, and clean streams create vital habitats for diverse fauna including the endangered Cantabrian brown bear, Iberian wolf, and capercaillie bird. Due to its high ecological value and fragility, human access is highly restricted, with only a limited number of visitors allowed via permit annually, mostly for scientific research and guided tours. Outdoor recreation opportunities center on careful hiking and wildlife observation, with trails winding through spectacular forested landscapes that showcase pristine nature and seasonal wildflower blooms. The reserve’s strict protection regime has allowed ecosystems to thrive with minimal human disruption, making it a sanctuary for biodiversity. For visitors, the appeal lies in experiencing an ancient, untouched forest and potentially spotting rare wildlife in a tranquil, mystical setting. Nearby small villages like Cangas del Narcea offer cultural insight and serve as gateways to this exceptional conservation area.
The ancient oak forest, one of the best-preserved oak stands in Europe
Habitat for endangered species such as the Cantabrian brown bear and Iberian wolf
UNESCO-designated Biosphere Reserve with strict conservation measures
Rare guided trails offering exclusive access to pristine wilderness
A centuries-old temperate forest with towering English oaks creating a lush canopy.
One of the few remaining sanctuaries for this endangered bear species in Europe.
Clear mountain streams that sustain diverse aquatic life within the reserve.