Trail Running calendar near Castle Rock 2025-2026

Aiden's Adventure 5K on June 6 in Colorado Springs is a family friendly run and kids dash honoring Aiden while benefiting local charities. Enjoy scenic trails, free shirts for early registrants, carnival games and food trucks.

Hit the scenic Devil's Backbone trails for the Crazy Legs 10k+ Trail Run on June 7, 2026, a looped course with rugged singletrack and friendly aid. Expect classic small race vibes, volunteer support, and stunning Colorado views.

Run the scenic Barr Lake Trail Race at Barr Lake State Park in Brighton, CO on June 13, 2026. Choose from 5K to 50K on a looped dirt course with continuous lake and Front Range views, friendly aid stations, and a relaxed mostly flat route.

Experience classic Colorado singletrack in Garden of the Gods and Pike National Forest on June 20, 2026 with 100K, 50K and 35K options. Expect big climbs, stunning views and full aid station support.

Race in the Clouds Alma Dirt Festival runs June 25 to 28, 2026 in Alma, Colorado at 10,600 ft. Mountain biking, trail runs, an off road duathlon, youth races and meadow camping offer high country climbs and single track thrills.

Run the Life Time Leadville Trail Marathon or Heavy Half on June 27, 2026, tackling high alpine singletrack and dirt roads through historic mining country up to Mosquito Pass at 13,185 feet. Expect a challenging, possibly snowy race with fu..

Celebrate July 4 with Pueblo's Firecracker 5K along the scenic Arkansas River Trail starting at City Park Pavilion. Family friendly fun with medals, outfit contests, Kona Ice and proceeds supporting Southern Colorado Runners Club.

High Trails Retreat in Buena Vista July 9 to 12 2026 offers daily runs of 10 to 20 miles and an optional Hope Pass or Sawatch 14er climb. Stay riverside, share meals, relax by the river and pick routes with the group.

Tackle high alpine trails above 10,000 ft at the Silverheels Trail Runs in Como, Colorado, July 10 to 11, 2026. Choose distances from the 100 Mile ultra to shorter options and run single track, fire roads and scenic historic mining country.

Join the Life Time Silver Rush 50 Run in Leadville for a high alpine 50 mile out and back plus 15 mile and 5K juniors. With seven aid stations and Leadville Trail 100 Run qualifier spots, this is a true mountain challenge.

Take on the Barr Trail Mountain Race in Manitou Springs, Colorado, a rugged 12.6 miles up to Barr Camp on Pikes Peak terrain and back to the trailhead. Part of the Garden to Peak Challenge, this summer favorite fills fast so register early.

Run a three day stage race across the Continental Divide from Hope Pass to Red Cliff in the Colorado Rockies. Fully supported camps with live bands, mobile showers and on site massage, plus a capped field of 500, make this a high alpine adv..

Pikes Peak Ultra in Colorado Springs offers trail distances from 20K to 50 mile on scenic granite singletrack with sweeping alpine views. Longer routes summit Mt Rosa while cupless aid stations and crew accessible stops keep you moving.

The Summit 200 is a 200 mile loop around Summit County Colorado that climbs into high alpine single track above 12,700 feet. Capped at 100 runners and requiring a prior 100 mile finish, it is a remote, high altitude test of endurance.

Take on the Sheep Mountain Trail Runs in Fairplay Colorado on August 1 2026 with 50 mile, 50k and half marathon options across high alpine trails. Expect rugged terrain, big mountain views, well stocked aid stations and a finisher award.

Run the Rockies Trail in Frisco, CO features 5K to half marathon routes on the scenic Frisco Peninsula with lakeshore finishes and reservoir views. Finishers receive a gift and an afterparty with food, music and beer for 21+.

Take on the iconic Leadville Trail 100 Run, a 100 mile ultramarathon through the Colorado Rockies that climbs to Hope Pass and delivers breathtaking high altitude views. A true test of endurance and grit.

Run mountain trails in Fraser, Colorado on August 22, 2026 with a scenic high elevation half marathon or a friendly 5K along dirt roads. All proceeds benefit the Shining Stars Foundation and dogs on leash are welcome.

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..

Challenge yourself on scenic Ridgeline Trail at Rock Hawk Trail Races on August 29, 2026 in Philip S. Miller Park, Castle Rock, CO. Choose from 5K to 50K distances, enjoy rolling terrain and finisher awards while supporting local trails.