Peinado, Stratovolcano in Catamarca Province, Argentina.

Peinado is a stratovolcano in Catamarca Province that rises to about 5,890 meters elevation. Its summit features a crater roughly 240 meters across, where an ephemeral lake occasionally forms at the peak.

Peinado began erupting about 100,000 years ago, and its last eruption occurred about 36,800 years ago; the volcano is considered capable of erupting again. Its cone and surrounding lava apron were built by flank vents that produced hundreds of lava flows. The edifice covers 96.2 square kilometres and has a volume of about 22.4 cubic kilometres.

The name Peinado is shared with the neighbouring salt lake Laguna Peinado, which lies just north of the volcano at 3,820 m; the lake is fed by groundwater, meltwater and hot springs reaching 33.13 °C that deposit travertine. The wider Peinado volcanic field around the cone holds maars, scoria cones and tuff rings emplaced between 600,000 and 150,000 years ago.

Peinado lies in Antofagasta de la Sierra Department, Catamarca, about 30 km from Paso San Francisco near the Chilean border, in largely uninhabited terrain. Access is by rough high-altitude roads; the cone rises about 1,630 m above its surroundings to 5,890 m, with no perennial snow or glaciers. Laguna Peinado, north of the volcano, is reached at 3,820 m and has hot springs up to 33 °C.

Peinado's summit crater, 240 metres wide and 25 metres deep, holds an ephemeral lake, and the cone has no perennial snow or glaciers. Twelve flank vents, two buried by lava, fed hundreds of dark and brown lava flows that built an apron burying the lower cone.