The Orosí Volcano, in Spanish the , is an inactive volcano in

Costa Rica Costa Rica, officially the Republic of Costa Rica, is a country in Central America. It borders Nicaragua to the north, the Caribbean Sea to the northeast, Panama to the southeast, and the Pacific Ocean to the southwest, as well as Maritime bo ...

, situated in the Cordillera de Guanacaste near the border with

Nicaragua Nicaragua, officially the Republic of Nicaragua, is the geographically largest Sovereign state, country in Central America, comprising . With a population of 7,142,529 as of 2024, it is the third-most populous country in Central America aft ...

. The area around the volcano is a popular tourist destination, especially for more ecologically minded tourists due to its biodiversity, including the Guanacaste National Park. ''Volcán Orosí'' itself has a conical shape as viewed from the north or west, but its flanks are heavily eroded. The complex includes Orosí, Orosilito, Volcán Pedregal, and Cacao. The highest peak of the volcanic complex is 1,659-m-high Volcán Cacao, 5.5 km southeast of Orosí. Historical eruptions were reported from Orosí in 1844 and 1849, but even at the time of the first volcanological observations at the end of the 19th century, Orosí was overgrown with large trees, and the eruptions may actually have been from neighboring Rincón de la Vieja. At the base of the volcano is the Maritza Biological Station, which researches aquatic biology, founded in conjunction with Stroud Water Research Center, Avondale, Pennsylvania, USA.

References

Stratovolcanoes of Costa Rica Mountains of Costa Rica Inactive volcanoes North American 1000 m summits {{Guanacaste-geo-stub