Trail Running calendar near Frisco 2025-2026

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...

Push your limits at the 12 Hours of Sunlight in Glenwood Springs, a 12 hour skin up and ski down endurance challenge on 1.3 mile laps with huge vertical gain per lap. Teams and individuals enjoy fuel stations, post race food and gear prizes..

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.

Gothic Mountain Tour is a scenic Nordic ski fundraiser in Crested Butte on Feb 15, 2026 supporting Crested Butte Nordic. Choose 23.5 miles competitive or 17.85 miles recreational and finish at the Magic Meadows Yurt.

Join the 21st Run Through Time in Salida, Colorado on March 14, 2026 for scenic high elevation trail races: marathon, half, and 2 mile. All registered runners get custom socks and proceeds benefit local trails and search and rescue.

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..

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 dirt trails with views of Pikes Peak at the Greenland Trail Races on May 2, 2026, featuring 50K, 25K, 8 mile and 4 mile options. All finishers get a technical shirt and medal and 50K finishers earn a commemorative 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..

Rugged trail running at Mueller State Park in Divide CO on May 16, 2026. Choose 10k, half marathon, marathon or a playful 12 hour loop draw where colored balls decide your next lap.

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.

Run Great Divide Ultra June 6 and 7 2026 in Divide Colorado with distances from 25k to the first Colorado 100 mile on scenic loops in Mueller State Park. Expect big climbs, crew friendly aid, finishers awards and a post race meal.

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.