Trail Running calendar near Castle Rock 2025-2026

Join the Valkyrie Trail Race on May 9, 2026 at Cheyenne Mountain State Park for a women focused day of stunning singletrack, rocky descents and springtime views. Distances from short runs up to 50K ultramarathon welcome all levels.

Endure Trail Runs at Mueller State Park: scenic single and double track courses offering 10K, half, marathon and a quirky 12 hour loop event where runners draw loop colors. Small field, central aid and on site camping.

Ram Party Trail Runs in the Colorado Springs Woodland Park area offers distances from 15K to a rugged 55 Mile course around Rampart Reservoir and Rampart Range Road. Enjoy stunning high country trails, finisher awards and podium prizes.

Run the 50 Mile or 50K in Buffalo Creek Colorado on scenic singletrack through ponderosa pines, granite outcrops and burn areas. Proceeds support North Fork Volunteer Fire Department and finishers get food, drinks and a commemorative award.

The Great Divide Ultra in Mueller State Park, Divide Colorado on June 6 and 7, 2026 offers 25k to 100 mile courses and a Saturday night trail run at sunset. Enjoy rolling meadows, granite views and a true mountain ultra festival atmosphere.

Join Aiden's Adventure 5k at Fountain Creek Regional Park for a relaxed, family friendly trail fun run with a virtual option and a kids mile. Enjoy crafts, a butterfly release, food trucks and community vibes while supporting local charitie..

Run high in the Colorado Rockies at Granby Ranch Resort on June 6, 2026 with distances from 6 Mile to 50k and a standout Elevation Challenge of repeated looped climbs. Expect single track trails, alpine meadows, stocked aid stations, and sw..

Run scenic ridgelines and singletrack at Devil's Backbone in the Crazy Legs 10k+ Trail Run, then celebrate with awards at Loveland Aleworks. Entry includes a hat with a random patch and aid near mile 3, and parking passes are required.

Run scenic dirt trails around Barr Lake State Park, with continuous lake and Front Range views. Distances range from a 5K up to a challenging 50K, with looped courses, aid stations on longer laps and a cupless race policy.

Ring the Springs invites trail runners to Garden of the Gods in Colorado Springs with 100K, 50K and 35K routes that climb into Pike National Forest and Mount Rosa. Enjoy scenic singletrack and a finish at Rock Ledge Ranch.

Run high alpine trails above Leadville, Colorado on June 27, 2026, with a rugged marathon and a shorter Heavy Half reaching Mosquito Pass at 13,185 feet. Expect old mining roads, stunning mountain views and a true high country challenge.

Race in the Clouds at Alma Cemetery Meadow is a high country weekend of mountain bike, trail and off road duathlon racing at 10,600 feet. Multiple distances, youth events and on site camping create a true alpine festival vibe.

Run under the full moon on Highlands Ranch trails in Chase the Moon, an overnight looped endurance event offering 12, 6 and 3 hour solos plus 50K and team relays. Enjoy scenic dirt trails, aid stations, and a festive night race atmosphere.

Silverheels Trail Runs in Como Colorado July 10 and 11 offers 10 mile to 100 mile races on high alpine singletrack through historic mining country. Expect thin air above 10,000 feet and strict qualifying for the longest races.

Experience Leadville's Silver Rush weekend in July 2026 with a rugged 50 mile out and back, a 15 mile option and a juniors 5K, plus a combined run and bike challenge. Enjoy high alpine views, big elevation and well stocked aid.

Three days of high alpine trail running around Leadville, Colorado crossing the continental divide from Hope Pass to Red Cliff with stunning fourteener views. Choose Full Pint or Half Pint stages, enjoy on site camp life with live bands, sh..

Tackle the iconic Barr Trail Mountain Race, a scenic 12.6 mile climb and descent from Manitou Springs toward Pikes Peak. This summer Front Range classic delivers rugged alpine views and counts toward the Garden to Peak Challenge.

Take on Pikes Peak Ultra in Colorado Springs on July 25, 2026, with distances from 20K to 50 Mile starting and finishing at Bear Creek Regional Park. Expect scenic trail climbs, Pikes Peak views and a true mountain test for trail runners.

Take on the Summit 200, a breathtaking 200 mile loop around Summit County, Colorado that climbs above 12,700 feet and delivers about 40,000 feet of gain. Expect remote high altitude single track, sparse aid and an epic endurance challenge.

Sheep Mountain Trail Runs in Fairplay Colorado offers 50 mile, 50k and half marathon courses across technical singletrack and alpine roads averaging over 10,600 ft. Expect sweeping mountain views, tough terrain and variable August weather.