Trail Running calendar near Vail 2026-2027

Tackle the legendary Leadville Trail 100, a 100 mile out and back ultramarathon through the high Colorado Rockies with steep climbs, technical singletrack and alpine passes up to 12,500 feet. Expect epic views, serious altitude and belt buc..

Run the Byers Peak Stampede in Fraser Colorado for a scenic half marathon or 5K on high country dirt roads with Rocky Mountain views. Family and dog friendly event with proceeds benefiting families affected by cancer.

Staunton Rocks! Marathon and Half deliver high altitude singletrack through Staunton State Park, offering sweeping mountain views, alpine wildlife, and serious vertical gain. With just 150 spots per distance, this rugged trail run fills fas..

Run high alpine trails around Steamboat Springs on August 29, 2026 with choices of 50K, 16 mile and 5 mile courses, featuring big climbs and stunning mountain views. Proceeds support the Trail Maintenance Endowment Fund and the race is cupl..

Run 40 miles across the Elk Mountains from Crested Butte to Aspen along the Grand Traverse route with more than 6,000 feet of climbing. A fundraising point to point ultramarathon with aid stations and a post race shuttle.

Run the Cirque Series at Arapahoe Basin: a scenic 9.4 miles with 2,211 ft of climbing on high alpine trails around Montezuma and Little Lenawee. Finish in Mountain Goat Plaza with live music, food, and festival vibes.

Join the American Heroes Run in Longmont, Colorado on September 11 and 12 to honor the victims and first responders of 2001 on a flat, fast 1.05 mile loop. Choose distances from 5K to 100 mile with timed and virtual options plus shirts and..

Join the Ned Ned Run in Old Town Nederland, Colorado in September, a 44 year tradition offering road and trail distances from a scenic 5K to a tough half marathon. Family friendly and costumes encouraged; dogs on leash welcome in the 5K.

Run high alpine trails at Snow Mountain Ranch in Granby Colorado on September 12 2026. Choices from 5K to 50K plus Moosehead challenges, scenic dirt and grass routes with on site lodging and camping.

Devil on the Divide in Empire Colorado on Sept 12 offers a high altitude point to point trail challenge with sweeping Continental Divide views. Choose 50K or 22K on rugged singletrack; ultrarunning experience required for the 50K.

Run Rabbit Run in Steamboat Springs Colorado is a trail ultramarathon with 100 mile and 50 mile courses through Routt National Forest and scenic peaks. Limited entries and a charity focus make it a bucket list event for adventurous ultrarun..

Take on the scenic trails of North Table Mountain Park in Golden and support BeyondHome’s work helping families build stable, self sufficient futures. Enjoy community vibes, stunning views, and artisan awards for top finishers.

Tackle high alpine single track and ridgeline trails at the Crested Butte Ultra in Colorado, with 50 mile, 55K, and 35K options for every level. Expect stunning mountain views, challenging climbs, and a finisher buckle and swag.

Run rugged high alpine trails around Buena Vista, Colorado at the West Line Winder on September 26, 2026, with 30K and 50K options across scenic singletrack and forest roads. Pair with the Sawatch Ascent 50k to take on the Sawatch 50/50 cha..

Sawatch Ascent is a mountain 50k in Nathrop, Colorado, around Mount Princeton spanning 33 miles and about 7,000 feet of climbing. Expect long singletrack, big alpine views, and finishers perks like a shirt, medal, and pro photos.

Bear Chase Trail Race is a two day endurance festival at Bear Creek Lake Park with distances from 5K to 100K on scenic single track trails. Ultras race Saturday, shorter events Sunday, and proceeds help Lakewood open space and trails.

Run Wildcat Mountain near Littleton with 10 mile, 10K and kids races on rolling dirt trails and wide mountain views. Finishers get a dry fit shirt, medal, pancake breakfast and post race beers.

Run the Rubey Rescue Run, a challenging 5K uphill trail in Aspen that climbs to the Cliff House with sweeping Maroon Bells views. Timed and dog friendly, the October race raises funds for the Aspen Animal Shelter.

Run scenic single track trails through lodgepole pine, aspen groves and red rock views at the Indian Creek Trail Runs in Sedalia, Colorado. Choose from 50 mile, 55k, 15 mile or 5 mile distances with stocked aid stations and finisher medals.

Run single track trails with Denver skyline views at the Great Trailhead Foot Race, offering 5 and 10 mile courses at Bear Creek Lake Park. Registration includes a tee, park entry, post run party, a 10 mile finisher mug and a shoe drive.