High Lonesome 100

JUL
17-18
2026
The High Lonesome 100 is a 101-mile mountain ultra through the Sawatch range. Runners traverse the Continental Divide, pass ghost towns, and climb over five alpine passes with 23,500 feet of total gain. This loop course offers a mix of single track, mining roads, and remote high-altitude terrain.
17-18 Jul 2026
101 miles

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High Lonesome 100

The High Lonesome 100 is a 101-mile endurance race in the Sawatch range of the Colorado Rocky Mountains. The event takes place on a loop course.

The route includes sections of the Continental Divide and Colorado Trail. It passes through two ghost towns and goes over five alpine passes, remote basins, and ridges. The course consists of 66% single track, 21% mining roads, 10% gravel roads, and 3% paved roads.

Key statistics for the race include a total elevation gain of 23,500 feet. The highest point on the course is 13,100 feet, the lowest point is 8,150 feet, and the average elevation is 10,600 feet. The event has a 37-hour time cutoff.

The start and finish location is on County Road 321 near Mount Princeton, Colorado. Visit the organization's website for the most recent information.

101 mi
101 Miles