The Turrialba is an active ‘Stratovolcano’ located on the east side of the Central Valley (10.03°N / -83.77°W), with a complex of three summit craters. New phreatic activity began on January 4, 2010, after signs of unrest beginning in 2006. Its previous eruption was in 1866.
The Turrialba is 3,340 meters (10,958 feet) high and located adjacent to the Irazú volcano, (3.432 meters) both are among Costa Rica’s largest volcanoes. The Turrialba has had at least five large explosive eruptions in last 3500 years. On clear days both the Pacific Ocean and the Caribbean Sea can be seen from the summit.
The volcano is named after its canton, Turrialba, in Cartago Province. There is no clear consensus on the origin of the name Turrialba, but historians disagree