Trail Running calendar near Eaton 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..

BINGO! Trail Party at May Farms in Byers on Nov 8, 2025 mixes looped trail running with a bingo twist where runners draw chips each loop to earn a finish before the 9:00 PM cutoff. Farm trails, one aid station and on site camping.

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 Twin Mountain Trudge in Laramie WY on Jan 10, 2026, choosing a ~10.2 mile single loop or a ~20.5 mile double. Thigh deep snow, ice and about 2,000 feet of climbing make this a rugged winter course that demands proper gear and grit.

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..

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..

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..

Experience alpine single track through meadows and forests at Granby Ranch Resort on June 6, 2026, with distances from 6 mile to 50k. Test your limits in the Elevation Challenge where repeated loops add to your total climbed elevation.

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.

Enjoy scenic treetop trails and Horsetooth Reservoir views at the Timberview Trail Run in Lory State Park, with 5K, 5 Mile and 10 Mile options for all abilities. This USATF event is 100% plant based and finishes with pancakes and craft beer..