Trail Running calendar near Jackson County 2026-2027

Summit Grays and Torreys Peaks in this 8.8 mile Colorado endurance event. Participants must carry a 20lb dry load while tackling 4,101 feet of elevation gain.

A Backyard Ultra at Loudy Simpson Park where runners repeat a 4.167 mile loop until one remains; a Citizens Race offers a single 4.167 mile loop for community participants.

Experience a hilly 5k trail race through the scenic Lory State Park. Enjoy a low key atmosphere followed by pizza, beverages, and a vintage race shirt in this midweek summer series event.

A four-race trail series on Tuesday evenings in August in Lory State Park. Distances include 5K, 10K, and 12K routes with varying elevation. Pizza and drinks follow each race, with series awards at the end.

Test your endurance at Snow Mountain Ranch with a 60 hour challenge on a 10 mile mountain trail loop. This all inclusive event features lodging, meals, and recovery support as you aim for milestones up to 100 miles.

Experience a high altitude trail run through the Rocky Mountains on 100 percent unpaved roads and trails. This dog friendly event in Fraser supports children facing cancer through the Shining Stars Foundation.

A mountain trail half marathon and a mostly downhill 5.6K in Arrowhead on August 22, 2026, featuring single-track terrain, a 9,560 ft summit, aid stations on the half, and age-group awards.

Experience a fast and flat 12k trail race through the scenic Valley Trails of Lory State Park. Enjoy a low key atmosphere followed by pizza, beverages, and a vintage race shirt in Bellvue.

A mountain trail race in Steamboat Springs with 50k, 16 mile, and 5 mile options, significant elevation gain, cupless aid stations, and proceeds supporting a trail maintenance endowment.

Experience a scenic run in Allenspark with majestic views of Mount Meeker and the Continental Divide. Choose between a competitive 5k or a casual 2k walk and bring your dog along for the race and an amateur dog show.

A multi day ultrarunning event in Loveland Colorado with timed events from 12 hour to 100 hour and distance races up to 200 mile on a two mile loop. Camping, continuous aid, chip timing, and event swag are provided.

Experience a high altitude mountain run at Arapahoe Basin covering 9.4 miles and 2,211 feet of vertical gain. Runners summit Little Lenawee peak and finish with live music and professional photos at Mountain Goat Plaza.

Experience a high altitude trail run starting at 10,000 feet on Rabbit Ears Pass. Runners navigate a mix of forest roads and single track trails with 1,200 feet of elevation change through scenic Colorado terrain.

A commemorative running event in Longmont, CO on a flat loop course, offering multiple race formats including a 100 mile option and virtual entries, with on-course aid, finisher awards, and hot food available during overnight racing.

Experience a historic Colorado mountain tradition in Nederland with trail and road races. Choose between a half marathon, 10K, or a dog friendly 5K while winding through scenic trails and old town streets.

Trail running at Snow Mountain Ranch near Granby, Colorado offers distances from 5K to 50K on high-elevation dirt trails with notable climbs, multiple aid stations, and specific time limits for longer courses.

Experience the scenic trails of Lory State Park in this 13.5 mile mountain race featuring technical singletrack and stunning Rocky Mountain views. Enjoy a well supported course followed by a celebratory pancake breakfast at the finish.

Mountain trail races in Empire, Colorado offering 50K and 22K point to point courses with high altitude and substantial elevation gain. Prior ultra experience is required for the 50K and cut off times are enforced.

A trail race on Meadow Mountain in Minturn, Colorado featuring 11K and 5K routes across mountain meadows, historic sites, technical singletrack, aid stations offering water and Skratch hydration, and age group awards.

Run Rabbit Run in Steamboat Springs, Colorado offers 50 mile and 100 mile mountain courses through Routt National Forest with roughly 9,000 ft and 22,000 ft of climbing and prize money for the 100 mile.