Trail Running Calendar Colorado 2025-2026

Take 5 in the Garden invites runners to explore Garden of the Gods in Colorado Springs with road and trail distances. Enjoy traffic free courses past red rock formations and views of snow capped Pikes Peak.

Take on the Collegiate Peaks Trail Run in Buena Vista, Colorado on May 2, 2026, a rugged mountain course along the Arkansas River. Choose 25 miles or 50 miles and tackle big elevation changes on scenic single track and jeep trails.

The Pilgrimage is a 150 hour ultra in Colorado's high desert where runners repeat five off road routes about 55 miles per circuit. Only 45 spots and crewed or uncrewed divisions share a single home base with basic support.

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.

Adventure Fest at 18 Road in Fruita CO on May 9 to 10, 2026 is a weekend of mountain bike, gravel and trail running action with camping and a lively community vibe. Bring the crew for clinics, kids races, guided trips and evening awards.

Enjoy the Fruita Trail Half, a 13.8 mile singletrack loop in the North Fruita Desert with nearly 1,000 feet of climbing, switchbacks and striking butte views. Part of Adventure Fest, it starts and finishes at the same scenic trailhead.

Choose from 15K to 55 mile routes and explore scenic single track and forest roads around Rampart Reservoir, starting at Buffalo Lodge Bicycle Resort. Expect high alpine views near 9,500 feet, aid stations and a finisher award.

Join the Spirit Trail Race in Buena Vista on May 24, 2026 for marathon, half marathon or 9K during Memorial Day weekend and CKS Paddlefest. Scenic start at South Main Town Square and proceeds support local conservation and community groups.

Join Pyro's Push It Up River Trail Run on Memorial Day in New Castle to honor a fallen hero. Choose a family friendly 3.5 km riverside route or a scenic 7.7 km trail with climbs, wooded sections and river views.

Take on the North Fork 50 Mile or 50K trail ultramarathon on scenic singletrack in Buffalo Creek, Colorado, with mountain views and ponderosa forest. Celebrate at a lively post race festival and support the North Fork Volunteer Fire Departm..

Experience alpine single track, meadows and aspen groves at Granby Ranch on June 6, 2026, with options from a 50k, marathon and half to a 6 mile or the looped Elevation Challenge. Expect big climbs, stunning views, aid stations and a spirit..

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..

Mace's Hideout 100/50 offers 100 and 50 mile ultramarathon routes across Colorado's Wet Mountains. Traverse forests, alpine meadows and dry foothills with sweeping peaks, dark skies and a touch of outlaw lore.

Take on the Crazy Legs 10k trail run through the scenic Devil's Backbone Open Space in Loveland on June 7, 2026. Limited spots, marked trails, and a post race celebration at Loveland Aleworks make this a fun mountain running day.

Experience the Barr Lake Trail Race on June 13, 2026 in Brighton, Colorado, with scenic dirt trails and sweeping views of Barr Lake and the front range. Choose distances from 5K to 50K and enjoy a supportive, eco friendly race day with park..

San Juan Solstice 50 Mile Run is an ultramarathon scheduled for June 20, 2026. The event features a 50-mile course, with a dedicated course info page and an alternate course option, underscoring a challenging yet community-focused atmospher..

Ring the Springs offers 35K, 50K and 100K trail distances through Garden of the Gods and Pike National Forest, starting at Rock Ledge Ranch. Expect big climbs, varied terrain, aid stations and stunning mountain views.

The John Cappis is a challenging endurance peakbagging event held near Silverton, Colorado, featuring a roughly 50k course with about 19,000 feet of elevation gain. Participants summit multiple peaks in the rugged San Juan Mountains, naviga..

Run scenic trails at Lory State Park with sweeping views of Horsetooth Reservoir and the foothills. Choose from 10 mile, 5 mile or 5K courses at a USATF sanctioned, 100% plant based event with aid stations and medals.