High Quality Content by WIKIPEDIA articles! Mount Massive (14,428 feet) is a fourteener in the Sawatch Range of the US State of Colorado. It is the second tallest peak in Colorado, edging out the third highest, Mount Harvard, by seven feet, and lower than Mount Elbert by 19 feet (5.8 m). It is the third highest peak in the contiguous United States. It is located in Lake County, approximately 10 mi (16 km) west-southwest of Leadville and 18 mi (28 km) east of Aspen. It lies in the Mount Massive Wilderness, part of the San Isabel National Forest.