The main summit, Pico Laco or Pitón El Laco, has an altitude of , although a maximum height of has also been reported. Pico Laco is an andesitic lava dome with a height of above the surrounding terrain. The dome, with dimensions of , has two summits: the higher eastern one and a western summit, and has also been described as a volcanic plug. Pico Laco has been described as a resurgent volcano within a caldera, that is surrounded by secondary vents.