Niwot's Challenge

The Westminster Night Trail in Westminster, Colorado, is a vibrant night trail running event held at Standley Lake. Celebrating its 12th year, it offers distances of 50K, 35K, half marathon, 10K, and 5K, all on 100% packed dirt trails featuring a mix of single-track and bike paths. Runners experienc..

Staunton Rocks! Marathon & Half is a trail running event held at Staunton State Park in Pine, Colorado, featuring marathon (26.3 miles, 4,500 ft elevation gain) and half marathon (13.1 miles, 2,200 ft gain) distances. The course is predominantly singletrack (90%) with some dirt roads, set at high el..

The Bluffs 8K Trail Run is a challenging race held at Bluffs Regional Park in Lone Tree, Colorado. The course features rolling hills and beautiful views, with a mix of fine crushed gravel and some rugged, steep sections. The race starts and finishes near the Prairie Sky Park parking lot.Participants..

The Rock Hawk Trail Races take place at Philip S. Miller Park in Castle Rock, Colorado, featuring distances of 50K, 25K, 10K, and 5K. The event is held on the scenic, rolling trails of Miller Park and the Ridgeline Trail systems, offering a course that is not overly technical but still challenging a..

The HRCA Wildcat Mountain Trail Races, held in Littleton, Colorado, offer a scenic and challenging trail running experience through the HRCA Backcountry Wilderness Area. Participants can choose from a 10-mile or 10-kilometer course, both featuring 100% dirt trails with varied terrain and stunning mo..

The 24 Hours of Palmer Lake is an endurance running event held in Palmer Lake, Colorado, featuring a 24-hour race on a scenic 0.82-mile loop course atop the Palmer Divide at 7,240 feet elevation. Surrounded by mountains, the race offers a community-driven atmosphere focused on pushing mental and phy..