Trail Running calendar near Larkspur 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 Rock Hawk Trail Races at Philip S. Miller Park in Castle Rock with 5K, 10K, 25K and 50K on rolling singletrack and scenic ridge views. Proceeds support open space and the race offers chip timing and live split tracking.

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.

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.

Take on the legendary Pikes Peak Ascent and Marathon in Manitou Springs, Colorado, racing Barr Trail to the 14,115 foot summit. Choose the 13.3 mile Ascent to the top or the full 26.2 mile marathon up and back for a stunning high altitude c..

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.

Test yourself on the iconic Pikes Peak Ascent, a 13.3 mile run from Manitou Springs to the summit with breathtaking views and huge elevation gain. A bucket list challenge for runners who crave high altitude adventure.

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..

Take on the 24 Hours of Palmer Lake, a community driven 24 hour endurance run on a scenic 0.82 mile loop atop the Palmer Divide. Run among mountain views, chase a 100 mile buckle and test your limits.

A high-alpine 50k near Nathrop, Colorado that climbs to 13,150 feet and covers about 33 miles with roughly 7,000 feet of ascent. The route features long singletrack sections, three aid stations, camping options, and an 11 hour cutoff.

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.

On Oct 3, 2026 Above the Clouds Ultra in Woodland Park, Colorado offers 50K and 10K trail routes with sweeping Pikes Peak views. Tackle rugged climbs and scenic singletrack for a true mountain run.

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.

Take on technical single track trails, rolling hills and rocky bluffs at Palmer Park with 50K, 25K, 10K and 5K options. Enjoy city and Pikes Peak views while testing your trail skills at this Aravaipa Running event.

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.