Trail Running Calendar Colorado 2026-2027

Scenic dirt trails around Barr Lake offer looped courses with continuous lake and front range views. Distances from 5K to 50K suit beginners to ultrarunners, with aid stations on longer routes and a cupless sustainability focus.

Enjoy scenic single track trails through aspens and June wildflowers at the Howelsen Hill Trail Run in Steamboat Springs on June 13, 2026. Choose 4 or 8 mile courses and support local Knights of Columbus with your entry.

Run through sandstone formations and past Balanced Rock in Garden of the Gods Park, Colorado Springs, at the 10 Mile, 10K and trail run on June 14, 2026. Celebrate a supportive race atmosphere and a storied 45 year tradition.

Join the Leadville Trail 100 Run Camp in Leadville, Colorado, June 19 to 21 for a three day preview of the LT100 course. Enjoy guided day and night runs, gear demos, shuttles and recovery services for a full race ready experience.

Run the scenic San Juan Solstice 50, a challenging 50 mile mountain ultramarathon around Lake City, Colorado on June 20, 2026. Expect high alpine views, creek crossings and tight singletrack on a limited field by lottery entry.

Ring the Springs on June 20, 2026 in Colorado Springs offers scenic, high altitude trail races starting and finishing at Rock Ledge Ranch at Garden of the Gods. Choose from 35K, 50K or a tough 100K for stunning views and big climbs.

Race in the Clouds at Alma Cemetery Meadow offers high country trail running, mountain bike races and weekend camping at 10,600 feet. Choose from a trail half, 10K, multiple bike distances and free kids races for a weekend of alpine adventu..

Experience The John Cappis, a free mountaineering jaunt near Silverton Colorado on June 27, 2026. This rugged off trail challenge uses a changing route and checkpoint scoring so every mile you reach counts toward the finish.

Hit the foothill dirt trails at Lory State Park on June 27 for the Timberview Trail Run with 10 mile, 5 mile and beginner friendly 5K options. Finish with pancakes, craft beer and finisher swag at this USATF sanctioned community favorite.

Run the Life Time Leadville Trail Marathon or Heavy Half on June 27, 2026, tackling high alpine singletrack and dirt roads through historic mining country up to Mosquito Pass at 13,185 feet. Expect a challenging, possibly snowy race with fu..

Celebrate July 4 with Pueblo's Firecracker 5K along the scenic Arkansas River Trail starting at City Park Pavilion. Family friendly fun with medals, outfit contests, Kona Ice and proceeds supporting Southern Colorado Runners Club.

Celebrate July 4th with the Rendezvous Run for Independence, a community 5K run or walk in Winter Park, CO. Enjoy scenic Fraser River Trail views and finish at the Rendezvous Event Center for postrace refreshments, awards and prizes.

High Trails Retreat in Buena Vista July 9 to 12 2026 offers daily runs of 10 to 20 miles and an optional Hope Pass or Sawatch 14er climb. Stay riverside, share meals, relax by the river and pick routes with the group.

Experience high alpine trails above 10,000 feet at the Silverheels Trail Runs in Como, Colorado, July 10 to 11, 2026, with distances from 10 mile to 100 mile across scenic single track, meadows and historic mining sites. Limited fields make..

Hardrock Hundred is a legendary 100 mile ultramarathon around Silverton, Colorado, through high alpine backcountry. The 2026 route runs clockwise past historic mountain towns for a brutal but beautiful test of grit at altitude.

Take on alpine trails at Grin & Bear It in Crested Butte on July 11 2026, with run and mountain bike distances for all levels. Expect big climbs, sweeping alpine views and a start and finish at Crested Butte Nordic Center.

Join the Life Time Silver Rush 50 Run in Leadville for a high alpine 50 mile out and back plus 15 mile and 5K juniors. With seven aid stations and Leadville Trail 100 Run qualifier spots, this is a true mountain challenge.

The Ouray 100 Mile Endurance Run is a rugged 100 mile trail race in Ouray, Colorado, with massive climbing across the San Juan Mountains. This unfussy, traditional ultramarathon culminates with a dramatic ascent to the Bridge of Heaven.

High Lonesome 100 is a high elevation 100 mile loop ultramarathon in Colorado's Sawatch Range near Mount Princeton. Expect about 23,000 feet of climbing, long above treeline ridgelines and stunning mountain singletrack.

Run the Silverton Alpine Runs in Silverton, Colorado on July 18, 2026, with 50K, Marathon or 8 Miler options along high alpine jeep roads. Experience sweeping San Juan Mountain views and ghost town scenery on rugged courses that start and f..