Trail Running calendar near Louisville 2026-2027

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 trail race at Staunton State Park offering 26.3 mile and 13.1 mile courses over mostly singletrack with significant elevation gain, well marked trails, capped fields, and fully stocked aid stations.

A half marathon trail race in Evergreen, CO that reaches the summit of Bergen Peak. Organized by the local parks district, the event includes vendor tents, refreshments, a cup-free policy and course marshals.

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.

Rock Hawk Trail Races on August 29, 2026 in Castle Rock, Colorado offers 50K, 25K, 10K and 5K on rolling singletrack with cup-free aid stations, chip timing, finish-line photos, drop bags, and live split tracking.

A community trail event at the Arapahoe County Fairgrounds on 08/29/2026 with a 5K run, a family 5K walk that allows leashed dogs, and a kids 1 mile plus demonstrations, vendors, and a pancake breakfast.

Run Like the Wind in Allenspark on August 29, 2026 features a 5K race, a 2K run/walk and a dog jog option. Proceeds benefit The Old Gallery and participating dogs are entered in an amateur dog show.

A 5k trail run starting at 11,000 feet at Copper Mountain on August 29, 2026, presented by Mammut. The run takes place during the Union Peak Festival, which includes live music and festival activities afterward.

Multi-day ultrarunning event in Loveland, Colorado on a 2 mile loop with time-based options up to 100 hours and distance races to 200 miles. Continuous aid, chip timing, and camping are available.

A mountain trail race at Arapahoe Basin on September 5, 2026 covering 9.4 miles and 2,211 ft of vertical. The marked course uses established trails in White River National Forest and finishes in Mountain Goat Plaza with live music and food.

Join the community for a 5K run or walk on a brand new dirt course at the North Arvada Middle School Athletic Complex. Support local high school racers before taking on this off road route yourself.

A load bearing endurance event at Staunton State Park on September 5, 2026. Routes range from 6.5 to 21.5 miles with loads from 10 to 40 lb and proceeds benefit the Special Forces Foundation.

A remembrance running event in Longmont, Colorado on a flat 1.05 mile loop, offering timed and distance options from 5K to 100 miles. Amenities include race shirts, finisher awards, a stocked aid station, and hot food for overnight runners.

A longstanding Nederland, Colorado running event offering a 5K road run, a 10K trail, and a trail half marathon, with family-friendly features, on-leash dogs allowed in the 5K, and costume encouragement.

A trail running festival at Snow Mountain Ranch in Granby, CO featuring 50 km, 33 km, half marathon, 10 km and 5 km courses on dirt and grass trails with significant elevation, aid stations, drop bag support, and on site lodging and camping..

A 13.5 mile trail half around Lory State Park near Fort Collins with about 2,000 feet of climb, marked singletrack, aid stations, and a free one mile kids race.

Devil on the Divide in Empire, Colorado is a point to point trail event on September 12, 2026 offering 50K and 22K options with high alpine terrain and substantial elevation gain; prior ultra experience is required for the 50K.

A trail race on Meadow Mountain in Minturn, Colorado offering an 11K and a 5K route across singletrack and meadows with stream crossings, scenic mountain views, on-course aid stations, and finish-line t-shirts and refreshments.

Trail race in Golden, Colorado with 10 mile and 5 mile courses on North Table Mountain. Organized by BeyondHome to raise funds for families moving from homelessness to self sufficiency.

A 13.3 mile mountain race from Manitou Springs to the 14,115 foot summit of Pikes Peak, gaining about 7,800 feet on the historic Barr Trail. The 2026 Ascent uses wave placement based on estimated times and invites elite competitors.