Lautaro is an active subglacial stratovolcano located in Chilean Patagonia, in the northern part of the Southern Patagonian Ice Field.

Its summit rises roughly 2,400 m (7,900 ft) above the average surface of the ice cap plateau.

Lautaro is located within the Southern Patagonian Ice Field, and is the highest summit in its area.

It has a parasitic vent on the western side[8] and two volcanic craters just north of the summit, one of which is 1 kilometre (0.62 mi) wide.

[16] The peculiar composition of AVZ magmas appears to reflect the melting of slab rocks from the downgoing Antarctic Plate.

[19] Two tephra layers in Lago Cardiel emplaced 3,345 and 3,010 years ago could come from Lautaro or another northern AVZ volcano.

[7] Tephra layers from several historical eruptions have been found in adjacent lakes,[23] where ecosystems were altered by the ash fallout.

They climbed the southeast ridge, encountering many crevasses, some steep ice walls, cornices, and a snow mushroom at the summit.

[6] The second ascent was made by Eric Jones, Mick Coffey, and Leo Dickinson on 2 March 1973, as part of a crossing of the Southern Patagonian Ice Field.