Trail Running Calendar Colorado 2026-2027

Explore Colorado's peaks in this series of five mountain races. Run four scenic half marathons and a challenging 25K across the state from June to September. Participants can choose to tackle three, four, or all five events.

The John Cappis is a demanding 50k mountaineering trek through the peaks around Silverton, Colorado. It features extensive off-trail travel and major elevation gain. Participation requires club membership and proven experience in rugged mou..

The Timberview Trail Run returns for its seventh year at Lory State Park. Choose from scenic 5K, 5-mile, or 10-mile trail courses with views of Horsetooth Reservoir. Participants receive a shirt, finisher medal, and post-race refreshments.

Event Information The Leadville Trail Marathon & Heavy Half Marathon takes place in Leadville, Colorado. The event offers two distances: a 26.4-mile trail marathon and a 15.46-mile "Heavy Half." Course Details The marathon cou..

SBT TRL is a trail run at historic Howelsen Hill, featuring 5K and 10K distances. Held alongside the SBT GRVL bike event, it includes a post-race awards ceremony and raffle at Little Toots Park. Hikers are welcome on the 5K course.

Celebrate Independence Day with a festive 5k along Pueblo's Arkansas River Trail. This family-friendly event features costume prizes, finisher medals, and post-race activities. Proceeds support the local running community and charitable cau..

Kick off Independence Day with a 5k run/walk in Winter Park, Colorado. The scenic route travels along the Fraser River Trail and finishes at the Rendezvous Event Center for a post-race party.

Celebrate the Fourth of July at over 10,000 feet in North America’s highest city. This 5K run and walk through downtown Leadville supports local youth athletics and begins just before the annual holiday parade.

This 8-mile trail race climbs Hahns Peak, a 10,839-foot extinct volcano in Colorado, finishing at a historic fire lookout. The course features 2,200 feet of elevation gain over mixed terrain. Proceeds support local high school running progr..

The 1876 Centennial Run in Snowmass Village offers four unique distances, from a 3.76k to an 18.76k challenge. The event starts and ends at the New Belgium Ranger Station and is part of the Colorado Brewery Running Series, with proceeds sup..

Experience a long weekend of trail running and hiking in Buena Vista, Colorado. Enjoy daily adventures ranging from 10 to 20 miles, a group peak ascent, and riverside lodging in the heart of the Sawatch Range.

High elevation trail runs in Como, Colorado on July 10 and 11, 2026. Distances range from 10 mile to 100 mile and include a point to point 100k and a nonrepetitive 100 mile route through alpine meadows, mining sites and national forests.

Event Overview The Hardrock Hundred Mile Endurance Run, also known as the Hardrock 100, is a 100-mile ultramarathon. The course involves 66,394 feet of total elevation change, with 33,197 feet of climbing and 33,197 feet of descent. The ave..

Crested Butte's oldest trail challenge offers a classic 15k run and a 25k loop. A mountain bike event joins the lineup, tackling a rugged 14.8-mile course. This low-frills event focuses on the trail experience over awards.

Event Overview The Silver Rush 50 Run is a running event scheduled for July 11, 2026. The event features multiple race distances: a 50-mile run, a 15-mile run, and a 5K Juniors run. There is also a Silver King & Silver Queen challenge f..

Tackle a formidable 100-mile route with over 41,000 feet of climbing in Colorado's San Juan Mountains. This low-frills event requires volunteer service and awards cash prizes subject to drug testing. Finishers earn a distinctive belt buckle..

The High Lonesome 100 is a 101-mile mountain ultra through the Sawatch range. Runners traverse the Continental Divide, pass ghost towns, and climb over five alpine passes with 23,500 feet of total gain. This loop course offers a mix of sing..

Trail runs in Colorado's San Juan Mountains feature a 50K, marathon, and 8-mile course on historic jeep roads. The routes pass ghost towns and reach the high point of California Pass. The event is cupless with no crew access at aid stations..

Tackle the Stagecoach Trail at Powderhorn Mountain Resort. Choose between a steep 5K climb or a demanding 15K that goes up the mountain twice. The registration includes a lift pass, t-shirt, and post-race food.

Run through wildflowers and Aspens along Spring Creek in Steamboat Springs. Choose between a challenging 9.5-mile loop with significant climbing or a rolling 5K out-and-back. This memorial event includes a post-race meal.