Red Cliff (sometimes spelled Redcliff) is a Statutory Town in Eagle County, Colorado, United States. The population was 289 at the 2000 census. The town is a former mining camp situated in the canyon of the upper Eagle River just off U.S. Highway 24 north of Tennessee Pass. The town site is concealed below the highway (which passes over the Red Cliff Truss Bridge) and is accessible by a side road leading to Shrine Pass in the Sawatch Range. It was founded in 1879 during the Colorado Silver Boom by miners from Leadville who came over Tennessee Pass scouting for better prospects. The name derives from the red quartzite cliffs surrounding the town.