Cinnamon Mountain is a 13,336-foot-elevation (4,065-meter) summit in San Juan County, Colorado, United States.

Access to the mountain is via the Alpine Loop Back Country Byway at Cinnamon Pass.

The mountain's toponym has been officially adopted by the United States Board on Geographic Names.

[6] Due to its altitude, it receives precipitation all year, as snow in winter and as thunderstorms in summer, with a dry period in late spring.

Hikers can expect afternoon rain, hail, and lightning from the seasonal monsoon in late July and August.