Greenland Trail Races

Larkspur, United States • 2 May 2026

The Greenland Trail Races, held annually in May at Greenland Open Space in Larkspur, Colorado, offer four race distances: 4 miles, 8 miles, 25K, and the 50K ultramarathon, known as Colorado's fastest 50K. The course features wide, smooth dirt trails through native grasslands, oak hills, and ponderosa pine forests, with scenic views of Pikes Peak. The 50K and 25K races involve multiple loops of a course that includes a high point at 7,400 feet. Participants enjoy a festive atmosphere with fully stocked aid stations, professional chip timing, finisher medals, technical shirts, and post-race pizza and beer. The event is beginner-friendly and supports virtual participation. Visit the organization's website for the most recent information.

Race information

50 km
50k
25 km
25k
8 mi
8 Mile
4 mi
4 Mile
Visit the organization's website for the most recent information.
Trail runs nearby

The Cheyenne Mountain Run, held at Cheyenne Mountain State Park in Colorado Springs, offers three trail race distances: 5K, 10K, and a challenging 25K that ascends to the summit of Cheyenne Mountain. The event features a staggered start from the Limekiln Trailhead, with courses traversing scenic tra..

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 courses run on the scenic, rolling trails of Miller Park and the Ridgeline Trail system, offering a mix of challenge and excitement without being overly technical..

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 Pony Express Trail Run is a scenic trail race held at Rampart Reservoir near Woodland Park, Colorado, at elevations between 9,000 and 9,400 feet. Offering two distance options—8.5 miles and 16 miles—the course features rolling single-track dirt trails with rocky sections and exposed roots, inclu..

The Pikes Peak Marathon, held annually in Manitou Springs, Colorado, is a challenging 26.2-mile race featuring a grueling 7,834-foot elevation gain and loss. Participants run from Manitou Springs to the summit of Pikes Peak and back, making it a unique mountain marathon known as "America's Ultimate..