Cerro Macá is a relatively small volcano with a volume of only .It has a summit elevation of approximately 2,300 m above sea level and features glaciers that in 2011 covered an area of . The edifice is partially eroded and a sector collapse is probably the origin of a large steep sided depression in the summit area. Pyroclastic cones with associated lava flows are found on its southwestern flank but also on the other slopes of the volcano, as far down as sea level and in the Bahia Aysen.