The forests in this reserve are extraordinarily important, not only for the protection they provide for the enormous system of drainage basins that exist here, but also because they form a biological corridor connecting Braulio Carrillo, Irazú Volcano and Turrialba Volcano National Parks. Two very characteristic species in these forests are the tree-ferns (Cyathea fulva) and poor man’s umbrella (Gunnera insignis), with its enormous leaves. A few dirt roads leave from Sacramento and Rancho Redondo and go a little way into the southern part of the reserve.