The Natural Park of Fuentes del Narcea, Degaña e Ibias (Spanish: Parque Natural de las Fuentes del Narcea, Degaña e Ibias) is a natural park in the Principality of Asturias in northern Spain. It protects a natural landscape at the sources of the rivers Narcea and Ibias. It is located within the municipalities of Cangas del Narcea, Degaña and Ibias. The park was designated in 2002 and incorporated the preexisting Muniellos biosphere reserve, which was extended in 2003. The heart of the natural park is the Muniellos nature reserve (area 5,488 ha), where human access is strictly controlled and where timber extraction has been forbidden since 1970. In 2000 UNESCO designated Muniellos as a biosphere reserve, the area of which was extended in 2003 to take account of the creation of the natural park. The core area of the Muniellos biosphere reserve occupies 8,661 ha with the rest of the natural park being regarded as a buffer zone.