Aspen Mountain is a ski area in the western United States, located in Pitkin County, Colorado, just outside and above the city of Aspen. Situated on the north flank of Aspen Mountain, its summit elevation is 11,212 feet (3,417 m) above sea level. Aspen Mountain forms the end of Richmond Ridge, a long ridge that extends ten miles (16 km) south at approximately 11,000 ft (3,350 m) to join the main spine of the Elk Mountains.

Aspen is a home rule municipality that is the county seat and the most populous municipality of Pitkin County, Colorado, United States. The city population was 7,004 at the 2020 United States Census. Aspen is in a remote area of the Rocky Mountains' Sawatch Range and Elk Mountains, along the Roaring Fork River at an elevation just below 8,000 feet (2,400 m) above sea level on the Western Slope, 11 miles (18 km) west of the Continental Divide. Aspen is now a part of the Glenwood Springs, CO Micropolitan Statistical Area.