Ultramarathons in Highlands Ranch

Saturday, April 11 · Highlands Ranch, Colorado

The Mountain Ridge 21 Mile in April takes runners through Colorado's front range on a "Y"-shaped out-and-back course that's 90% dirt trails with some bike path sections. The race starts and finishes at Mountain Ridge Middle School in Highlands Ranch, covering roughly 22 miles with about 2,100 feet of elevation gain and a 6.5-hour time limit. Expect rolling terrain rather than sustained climbs, with the major ascent hitting right at mile one before the course settles into more manageable ups and downs. The route primarily follows the Douglas County East-West Regional Trail system, moving through a mix of single-track and wider trail sections. Four aid stations spread across the course provide support, though this is a cupless race requiring runners to bring their own hydration vessels. Runners comfortable with moderate climbing and longer efforts on non-technical terrain will find this race approachable, while those seeking steep mountain challenges or highly technical single-track might want something with more bite. The front range setting offers decent views without extreme exposure, and the April timing typically means mild but variable spring weather conditions.