The High Lonesome 100 is a challenging ultra marathon held in the Sawatch Range of the Colorado Rocky Mountains. This 100-mile trail race takes runners on a loop through beautiful singletrack, including sections of the National Continental Divide and Colorado Trails, through ghost towns, over alpine passes, and across remote basins. With experienced staff and volunteers, the race promises to be a great community event. If you're looking for a true mountain race in the spirit of classic 100 milers, this is the event for you. Registration information, course details, volunteer opportunities, and sponsorship information can be found on their website.