How many volcanoes are in Costa Rica? Costa Rica is located along the Ring of Fire which extends along much of the coastline of the Pacific Ocean. Over two hundred volcanic formations have been identified, though only 5* are considered active. Costa Rica's active volcanoes include Arenal, Rincon de la Vieja, Poas, Irazu and Turrialba. *There is plenty of activity such as hot springs, fumaroles and boiling mud pits in the area of Miravalles Volcano, though it is not officially considered active.