 The initiative for park delimitation and protection was resumed in 1984; however, it was in 1987 that the forest was protected by a decree.The protected area covers of forest land along the upper River Mayo basin.The protected area also covers part of Moyobamba district within the province of Moyobamba; Rioja, Elias Soplin Vargas, Nueva Cajamarca, Awajun and Pardo Miguel districts within the province of Rioja; and a small part of the Vista Alegre district, within the province of Rodriguez de Mendoza, in the neighboring region of Amazonas.