The Tapanti National Park, Macizo Cerro La Muerte protects
forested areas in the northern Talamanca Mountain region, north of
Chirripo National
Park.
The park is traversed by the Rio Grande de Orosi, with many other rivers
and creeks joining the main river.
The upper Orosi River Valley watershed
is one of the rainiest areas of Costa Rica, receiving up to 280 inches of rain annually. It eventually drains into
Lake Cachi, the site of the Cachi Dam and Angostura hydroelectric project.