High Lonesome 100
Mount Princeton, United States • 17-18 Jul 2026
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.