The High Lonesome 100 is a challenging 100-mile trail race that takes place in the Sawatch Range of the Colorado Rocky Mountains. With 23,500' of vertical gain and reaching an elevation of 13,150', it offers a tough course for endurance runners. The race runs in a loop through beautiful singletrack trails, including the National Continental Divide and Colorado Trails, passing through ghost towns, alpine passes, remote basins, and soaring ridges. The event is staffed by experienced individuals dedicated to creating a wonderful community for participants. Registration information, course details, volunteer opportunities, and sponsorship information can be found on their website.