Atacazo is a volcano of the Western Cordillera located 25 kilometers southwest of Quito, Ecuador.

Atacazo is a stratovolcano formed by the action of a Late-Pleistocene to Holocene caldera.

On November 7, 1960 a Fairchild F-27 turboprop passenger plane, operated by the now-defunct national airline AREA Ecuador, struck the Atacazo in bad weather during its approach to the newly-inaugurated Mariscal Sucre International Airport after a flight from Simón Bolívar International Airport, in Guayaquil.

[2][3] The crash, 16 kilometres (9.9 mi) south of Quito and 150 meters to the summit of the Atacazo, killed all the 37 occupants of the plane.

[4] At the time, it was the worst aerial crash in the history of Ecuador, the first and worst fatal loss of an F-27 passenger plane, and the first accident involving the then-recently-opened Quito airport.