Trail Running calendar near Auraria 2026-2027

A four-race August trail series at Lory State Park in Fort Collins featuring 5k, 10k and 12k courses with chip timing, series points and end-of-series awards. Post-race pizza and beverages are provided.

Experience the Frisco Peninsula trails with a choice of 5 km, 10 km, or Half Marathon distances. Enjoy a scenic course featuring single track trails and dirt roads with views of Dillon Reservoir and the Ten Mile Range.

Experience a focused trail run through the hills of Lory State Park with 1,700 feet of elevation gain. Enjoy a post-race social with pizza and beer in a scenic outdoor setting limited to 100 participants.

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.

A multi-distance race at Boulder Reservoir, Colorado, featuring a mostly dirt and trail course with about 200 feet of elevation gain and views of the reservoir and the Rocky Mountains.

Experience the first ever trail race through the iconic red rocks of Roxborough State Park. Tackle 50 miles or 50k of technical singletrack and high country terrain before enjoying a finish line celebration with food trucks and local brew.

Experience the trails of Cheyenne Mountain State Park with three race distances ranging from a 5K walk to a 25K mountain challenge. This chip timed fundraiser supports park conservation through scenic and high elevation courses.

Trail races around Standley Lake in Westminster, Colorado, in August 2026 offering 50K, 35K, half, 10K and 5K on 100% dirt trails with out-and-back course formats, parking at Wayne Carle Middle School, and support stations along the routes.

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.

Experience the historic Race Across the Sky in the Colorado Rockies. This legendary 100 mile ultramarathon features over 15,000 feet of elevation gain reaching heights of 12,626 feet.

Experience the high-altitude scenery of Leadville on this 10K course, which follows the first and final miles of the famous LT100 Run. With a single aid station and awards for top finishers, it's a classic mountain run. Registration is open..

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.

Experience high altitude trail running through the scenic singletrack and historic landmarks of Staunton State Park. Choose between a full or half marathon featuring sweeping mountain views and a festive post-race meal.

Trail half marathon in Evergreen, Colorado on August 22, 2026. The 11 mile course gains over 1,300 feet, tops out just under 9,000 feet, and runs through Elk Meadow and Too Long Trail from Buchanan Park Recreation Center.

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.

Experience the rolling trails and scenic views of Philip S. Miller Park in Castle Rock. With distances from 5K to 50K, this event offers well stocked aid stations and a supportive environment for all trail runners.

Join a family friendly trail event in Aurora featuring 5K distances and a kids run. Enjoy dog demonstrations, a pancake breakfast, and a kids fun zone while supporting therapy and patrol K9 units.