The High Lonesome 100 is a challenging ultra marathon race that takes place in the Sawatch Range of the Colorado Rocky Mountains. With a course that includes 23,500 feet of vertical gain and reaches an elevation of 13,150 feet, it offers a true mountain race experience. The race features beautiful singletrack trails, takes runners on the National Continental Divide and Colorado Trails, and passes through ghost towns and remote basins. The event is organized by an all-volunteer team and has a strong sense of community. Registration information for runners, course details, and volunteer opportunities are available on their website.