Situated 60 km from Fianarantsoa on the route to Mananjary after the last winding down road , Ranomafana National Park spreads over 41.000 ha of humid forest with abrupt slopes hills and sometimes a reminiscence of the Betsimisaraka cliff .
The altitude varies from 600 to 1.417 m with temperatures going from -1° to 30°C. The watered and humid climate is propitious to the development of waterways such the Namorona that feeds the alone Malagasy southern hydroelectric central. This river at the level of Vohiparara is still a tranquil river inviting to the swim, two kilometers lower it is transformed into a succession of falls on more of ten kilometers. The Park is opened all the year. Nevertheless the period of big rains of September to November is not recommended .

Ranomafana National Park presents alike all mountain forests a superposition of varied species according to the altitude. The intact primary forest is rich in Apocynaceae, Euphorbaceae and other Rubiaceae. The secondary forest on the other hand is dominated by fern Psidium. The epiphyts are numerous and have made the reputation of the Park

The forest of Ranomafana National Park is the unique place where the browned Hapalemur which shares its territory with the Great Hapalemur (Hapalemur simus) has been discovered in 1986 . The avifauna is important with 118 species of birds some of them are rare and endemic to the Park. Their geographical distribution is limited ,this allows to organize an ornithological circuit permanently animated by the Couas, Ibis and Rolliers songs . At the Ecomuseum which is the Environmental Center of Interpretation of the Park, the visitor can learn to dominate its fear of snake by taking in his arms the placid Malagasy boa .