Trail Running calendar near Winter Park 2025-2026

Run the Colleen De Reuck XC Classic in Boulder on November 1, 2025 at Harlow Platts Community Park. Youth and open cross country races celebrate local distance legends and offer scenic fall competition as part of the Boulder XC series.

Test your endurance at the Colorado 24 Hour Run in Fort Collins Nov 1 to 2, 2025 with solo and relay 24, 12 or 6 hour timed events. Run a flat, fully supported one mile dirt loop and enjoy a friendly post race celebration.

Take on the 17th annual HRCA Backcountry Wilderness Half Marathon in Lone Tree, Colorado on November 8, 2025. Enjoy a scenic 13.1 mile trail loop through Highlands Ranch backcountry with classic November conditions, plus a pancake breakfast..

Run scenic trails around the Flat Irons in Louisville, CO on November 15, 2025, with 5K, 10K and half marathon options. Mostly dirt out and back courses with friendly aid stations and a cupless format for a true fall trail experience.

Challenge yourself in the Thumbs Up Vertical in Estes Park, an 8 hour timed ascent limited to 30 runners. Each 540 ft steep scenic single track lap earns a poker chip, with milestone patches and a prize for the overall winner.

Run the Sawmill Trail Runs at Staunton State Park on Dec 6 with 50k, 16 mile, and 8 mile options through alpine meadows and granite cliffs. High elevation, a limited field, and well stocked aid stations promise a scenic, challenging winter..

Take on the Summit for Life in Aspen on December 6, 2025 with options to race uphill, ride the scenic gondola, or join virtually. Celebrate afterward at the Sundeck with food, live music and awards.

USCSA Cross Country Ski Racing Festival, hosted by Colorado Mesa University at Snow Mountain Ranch Nordic Center in Granby, Colorado, on January 24–25, 2026, brings collegiate teams together with junior skiers for a two-day Nordic festival...

Tackle the Sourdough Snowshoe Race in Nederland CO on Jan 31 2026, a donation based backcountry challenge where snowshoes are required for the full route. Choose 18K or 30K and warm up at the finish with hot drinks and a warming tent.

Race The Ranch at Snow Mountain Ranch in Granby Colorado on April 4, 2026 is a scenic snowshoe race with distances up to 50k on singletrack and groomed trails. Tackle challenging loops, enjoy on course aid, and earn a custom finisher mug.

Run the Ranch is a weekend trail festival at Sylvan Dale Guest Ranch in Loveland, CO, featuring 5K, 10K and timed 4, 6 and 12 hour events plus relays and virtual options. Enjoy varied ranch terrain, on course support, meal tickets for entra..

Hit the scenic Great Western Trail in Severance on April 18, 2026 with 5K, 10K, half marathon and kids fun run options for every level. Enjoy chip timing, finisher shirt and medal, plus post race food and beer while supporting local nonprof..

Challenge yourself on the Mountain Ridge Trail Race in Highlands Ranch, CO, with 21.8 miles, 13 miles, 6.2 miles and 3.1 miles on scenic dirt single track and bike path featuring plenty of climbing. Trail shoes are recommended for this out..

Run scenic trails with Pikes Peak views at the Greenland Trail Races in Larkspur on May 2, 2026. Options from 4 miles to the RRCA National 50K Championship include chip timing, tech shirts, finisher medals and a 50K buckle.

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.

Niwot's Challenge in Sedalia on May 2, 2026 is invitation and acceptance only, not a race, testing rugged off trail navigation and self sufficiency across punishing loops with massive elevation gain. Traditional entries rely on map and comp..

Quad Rock 25 and 50 deliver rugged singletrack and big Colorado climbs around Fort Collins, offering a 25 mile single loop or 50 mile double loop with roughly 5,500 or 11,000 ft of gain. Entries are capped and registration opens Dec 15, 202..

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.

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.

Weld Your Mettle Running Festival in Eaton, Colorado on May 30-31, 2026 invites runners to repeat a scenic four mile loop for distances from a 7K up to 100 miles, plus relay and virtual options. Expect stocked aid, finisher swag, recovery t..