Fairchild Mountain, Mountain summit in Larimer County, United States

Fairchild Mountain is a 13,508-foot (4,117 m) thirteener in the Mummy Range, inside the Rocky Mountain National Park Wilderness of Larimer County, Colorado, 9.6 miles northwest of Estes Park. Its climate is classified as ET (tundra).

The peak received its name in honor of Lucius Fairchild, a notable American politician from the 1800s. This naming tradition reflected the era when many geographical features in the region were designated after influential figures.

The name honours Lucius Fairchild, a Civil War veteran who was Governor of Wisconsin and later U.S. Minister to Spain. The summit lies in the Mummy Range, a name shared with the surrounding range inside Rocky Mountain National Park. The mountain's climate is classed as ET, tundra.

Hikers access the summit via a 17.5-mile (28-kilometer) round trip from Lawn Lake trailhead, with about 4,962 feet (1,512 meters) of elevation gain across varied terrain. Summer is the ideal season for this hike, as snow melts and trails become passable.

Fairchild Mountain honours Lucius Fairchild, a Civil War veteran who served as Governor of Wisconsin and later as U.S. Minister to Spain. The name ties a Rocky Mountain summit to a diplomat's career in Madrid rather than to any explorer of the range.