The High Lonesome 100 is a challenging ultra marathon race that takes place in the Sawatch Range of the Colorado Rocky Mountains. With 23,500 feet of vertical gain and reaching an elevation of 13,150 feet, it offers a demanding course for experienced trail runners. The race takes participants on a loop through beautiful singletrack trails, including sections of the National Continental Divide and Colorado Trails, passing through ghost towns and traversing alpine passes and remote basins. The event is organized by a dedicated team of volunteers and offers a supportive and welcoming community for participants. Registration information, course details, volunteer opportunities, and sponsorship information can be found on their website.