Colorado
Colorado Trail Running Calendar 2026-2027
Explore the best trail runs in Colorado for 2026-2027! Our updated list features 149 exciting trail runs across the region. Find your next trail run in Colorado below and join the trail community at these great events!
July 2027
High altitude trail races in Como and Grant, Colorado on July 9 and 10 2027, offering multiple distances including a point to point 100k and a 100 mile with qualifying rules.
A 100-mile loop ultramarathon around Silverton, Colorado, with 66,882 feet of elevation change and high alpine terrain on trails and 4WD roads.
An approximately 50 mile out and back mountain run near Leadville with about 8,000 feet of elevation gain and LT100 qualifier status.
A 100 mile trail race in Ouray, Colorado with 41,862 feet of elevation gain, required volunteer service or a $100 opt out, live SPOT tracking and postrace drug testing.
A 100 mile loop through Colorado’s Sawatch Range with 23,300 feet of gain, five alpine passes, and long sections on the Continental Divide Trail and Colorado Trail.
Experience a historic 12.6 mile mountain race ascending Pikes Peak from Manitou Springs to Barr Camp and back through the Pike National Forest.
Trail races in Silverton, Colorado featuring 50K, marathon and 8.4 mile courses on the Alpine Loop through historic mining towns and high mountain passes.
Trail ultramarathon in Colorado Springs offering 20K, 30K, 50K and 50 mile courses with high-elevation routes, crushed granite trails, and a cupless aid station system.
Three-day stage race in Moab, Utah (July 26-28, 2027) with two distance options, Half Pint and Full Pint.
A single 200 mile loop around Summit County, Colorado with about 40,000 ft of climb, high alpine sections, live GPS tracking and a 109 hour cutoff.
August 2027
Trail races in Aspen offering 50K, marathon and heavy half-marathon on dirt trails with substantial elevation gain and a finish festival at Rio Grande Park.
A four race midweek trail series at Lory State Park in August 2027 offering 5K, 10K and 12K options, post race food and beverages, and series awards.
A 200 mile point to point relay across Colorado from Fort Collins to Steamboat Springs with 36 legs and team options from solo to 12 runners.
Mountain trail races in Winter Park, CO featuring 50K, 21K and 10K courses on singletrack and dirt roads with aid stations and age group awards.
High-elevation trail event in Fairplay, Colorado offering 50-mile, 50k, and half marathon courses with stocked aid stations and specific pacer and drop bag options.
A 15 mile mountain trail race on August 7, 2027 in the La Plata Mountains, with 3,100 feet of elevation gain and proceeds supporting La Plata County Search & Rescue.
A four race midweek trail series at Lory State Park in August 2027 offering 5K, 10K and 12K options, post race food and beverages, and series awards.
Trail races at Rampart Reservoir offering 16 mile and 8 mile courses, shuttle service from Merit Academy, limited parking at Rainbow Gulch, horseshoe finisher medals and a membership raffle.
Trail races at Standley Lake in Westminster CO offering distances from 6K to 50K on 100% dirt courses with aid stations and parking at Wayne Carle Middle School.