Trail Running calendar near Nederland 2026-2027

A 5K run/walk in Winter Park, Colorado following the Fraser River Trail from Gondola Plaza to the Rendezvous Event Center, with an after party featuring refreshments, awards and prize giveaways.

A July 4 5 kilometer run or walk in downtown Leadville, with downtown bib pickup and an Independence Day parade afterward. Adult entry is $25 and youth 17 and under may enter for free, with proceeds supporting local youth athletics.

A mountain trail race on July 5, 2026 in Vail, Colorado covering 12.2 km with about 2,128 feet of climb, starting at Vail’s Mountain Haus and finishing at Mid-Vail. Aid stations, race shirts, awards and postrace refreshments are provided.

Experience high altitude trail running through historic Colorado ghost towns and mines at over 10000 feet. Choose from distances ranging from 10 miles to 100 miles in the scenic South Park Valley.

A high altitude out and back through Leadville's historic mining district, the Silver Rush 50 Run covers about 50 miles with substantial elevation gain and a 14 hour cutoff. The weekend also includes a 15 mile race, a juniors 5K, and LT100..

Experience the STRS Horseshoe Gulch Grind in Breckenridge with short and long course options. This trail event offers categories for adults and youth starting from the Blair Witch Trailhead.

Trail races on Spring Creek Trail in Steamboat Springs featuring a 9.5 mile scenic loop with about 1,750 ft gain and a rolling 5K out and back, plus a prize drawing and a post-race meal by Freshies.

Mountain trail races on Vail Mountain at 10,000 feet with rerouted 10K and 5K courses, gondola access to the start, aid stations and finish food, age-group awards, t-shirts and a post-race raffle.

Repeating 2 km out and back laps on the Thumb Open Space trail in Estes Park. Participants collect a poker chip at each turnaround and the most chips wins during a sunup to sundown timeframe; 35 spots and a $100 entry fee.

A community trail event at Ranch Camp with organized 5k and 10k courses, water stations, medical support, sliding-scale registration, and post-race tie-dye and crafts for finishers.

Experience a true mountain ultra through the rugged alpine peaks and lakes of Northern Colorado. Navigate technical trails and high ridges across 60km or 100km courses in a wild wilderness setting.

A 10 mile trail race at Staunton State Park in Pine, Colorado on July 25, 2026. The event lists water refilling at start and finish, no on course aid stations, and vendor tents and refreshments for spectators.

Experience a historic Colorado tradition where runners and burros compete together. Navigate mountain trails and high altitude passes while carrying traditional mining gear in this unique world championship event.

A single 200 mile loop in Summit County Colorado at sustained high altitude, capped at 75 runners, with about 40,000 feet of climbing, multiple aid and sleep stations, live GPS tracking, and a multiyear deferral policy.

STRS #4 - Tom's Baby on July 29, 2026 takes place at Tom's Baby Trailhead in Breckenridge, CO, offering short and long course entries with adult, youth, and non-binary categories and published entry fees.

Experience an epic 200 mile point to point team relay from Fort Collins to Steamboat Springs. Run through the heart of the Rocky Mountains and over two scenic mountain passes in this ultimate Colorado road race.

Experience high elevation trail running in the mountains of Fairplay Colorado. This event offers three distances ranging from a half marathon on forest roads to technical ultramarathons through remote wilderness terrain.

Experience high alpine racing through the scenic singletrack and forest trails of Winter Park Colorado. Join a point to point mountain adventure with distances ranging from a 10K loop to a technical 50K ultra.

An uphill trail race in Vail that starts at Gondola One and finishes at Mid-Vail, covering about 6.9 km with 2,013 feet of climb. Aid stations provide water and sports drink, and finish-line refreshments and age-group awards are part of the..

Two Brothers Up and Down in Idaho Springs offers two uphill out and back races on mixed dirt and paved roads, with steep sections and an aid station on the 10k. Both races start and finish at Courtney Riley Cooper Park.