Aracar, Stratovolcano in northwestern Argentina.

Aracar is a large conical stratovolcano in Salta province, northwestern Argentina, just east of the Chilean border. Its main summit crater, 1–1.5 km wide and several hundred metres deep, sometimes holds small lakes fed by snowmelt, and a shallow secondary crater about 100 m across sits nearby. Grey basaltic lava flows descend from the summit, giving a gentle western flank and much steeper eastern, northern and southern flanks.

The volcano was formed through three eruptive cycles during the Pliocene epoch, built over dacitic lava domes with visible lava flows at its base.

Inca sites sit on Aracar's summit and secondary crater: a stone circle with low walls just above the slopes into the main crater, and a terrace-shaped structure on the secondary crater's slopes, with a smaller terrace on its northeastern side. Timber and wood lie around the stone structures. The name is also spelled Arakar.

Accessing Aracar requires careful planning due to its remote location in high-altitude terrain, with most visitors traveling through Salta or Chilean border crossings.

The first recorded ascension occurred on April 1, 1958, when Jorge Cvitanic and two Austrian climbers successfully reached the summit despite extreme conditions.