Barva Volcano is an andesitic stratovolcano complex in central Costa Rica, 22 km north of San José, in Heredia Province.

On the eastern side of the mountain is a lake in what was the volcanic crater, called "Laguna de Barva", and on the western side it has three hills on the top which are called "Las Tres Marías".

Its three principal summits visible from the Central Valley give it the common local name of Las Tres Marías (The Three Marys).

Four pyroclastic cones are present within the 2 x 3 km caldera at the central and northwestern part of the summit.

[1] The last confirmed eruptive activity at Barva Volcano has been dated to 8,050 years ago.