According to the classification system of Holdridge life zones (1967), just over 80% of the total area of the reserve is located in the  Premontane rainforest, about 10% corresponds to the life zone of Lower montane rainforest, which corresponds to the upper parts of the row of dead volcanos and mountains in the north eastern boundary, a small percentage (less than 1%) on the southern boundary corresponds to the life zone of the  Very humid Premontane forest.
Holdridge life zones (1967) classify over 80% of the reserve as Premontane rainforest, with about 10% being Lower montane rainforest found in the upper parts of the volcanic mountain range at the northeastern boundary. A tiny portion (less than 1%) is located on the southern boundary and corresponds to Very humid Premontane forest.