Mount Massive is Colorado's second-highest summit at 14,427 feet, rising from the Mount Massive Wilderness in San Isabel National Forest about ten miles west of Leadville. It holds a distinction no other peak in the contiguous United States can claim: more terrain above 14,000 feet than anywhere else, with a broad, multi-summited crest stretching nearly three miles north to south. The mountain was first climbed in 1873 by Henry Gannett during the Hayden Survey, who gave it the name that still fits — massive in every dimension.
The standard approach is the East Slopes route, a roughly 13.5-mile round trip gaining around 3,500 feet from the Halfmoon Creek trailhead (note that the parking area is about 1.5 miles from the official trailhead, adding distance). The trail climbs through spruce forest, crosses South Willow and Willow Creeks, and eventually breaks into open tundra before reaching a 13,900-foot saddle. From the saddle the summit is a short push along the broad ridge, with Class 2 talus and loose rock near the top. The Southwest Slopes route from Halfmoon Creek is shorter in distance but steeper and more rugged.
Summit views span the entire Sawatch crest, with Mount Elbert visible close to the south and ranks of 14ers stretching in every direction. Afternoon thunderstorms arrive quickly at this elevation from June through September; early starts are essential. Snow lingers on the upper slopes well into June, and the East Ridge route is the preferred winter line for its relative avalanche safety.
