Trail Running calendar near Castle Rock 2026-2027

The Great Divide Ultra is a weekend trail festival in Divide, Colorado, June 6-7, 2026, featuring 25k, 50k, 100k and 100 mile looped races through Mueller State Park with rolling meadows and Pikes Peak views. A Dark Divide Night Run adds ev..

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.

Run the Crazy Legs 10k+ at Devil's Backbone Open Space in Loveland, Colorado, a scenic looped course through Hidden Valley and Hunter Loop. Expect volunteer staffed aid, local sponsors, and a friendly community vibe; park pass required.

Scenic dirt trails around Barr Lake offer looped courses with continuous lake and front range views. Distances from 5K to 50K suit beginners to ultrarunners, with aid stations on longer routes and a cupless sustainability focus.

Run through sandstone formations and past Balanced Rock in Garden of the Gods Park, Colorado Springs, at the 10 Mile, 10K and trail run on June 14, 2026. Celebrate a supportive race atmosphere and a storied 45 year tradition.

Join the Leadville Trail 100 Run Camp in Leadville, Colorado, June 19 to 21 for a three day preview of the LT100 course. Enjoy guided day and night runs, gear demos, shuttles and recovery services for a full race ready experience.

Ring the Springs on June 20, 2026 in Colorado Springs offers scenic, high altitude trail races starting and finishing at Rock Ledge Ranch at Garden of the Gods. Choose from 35K, 50K or a tough 100K for stunning views and big climbs.

Race in the Clouds at Alma Cemetery Meadow offers high country trail running, mountain bike races and weekend camping at 10,600 feet. Choose from a trail half, 10K, multiple bike distances and free kids races for a weekend of alpine adventu..

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.

Run high alpine trails above 10,000 feet at the Silverheels Trail Runs in Como, Colorado, July 10 to 11, 2026. Distances from 10 mile to 100 mile plus a 100k point to point course wind through meadows, aspen groves, creeks, and old mining c..

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.

Join TransRockies Run Pass to Pub for three days of alpine trail racing from Hope Pass to Red Cliff in Leadville, Colorado, with fully supported camp life, live music, showers and catered meals. Limited to 500 runners July 19 to 21, 2026.

Tackle rugged trails near Pikes Peak in the Pikes Peak Ultra, a scenic trail ultramarathon in Colorado Springs with 20K to 50 Mile options, including summit runs on Mt Rosa for the longer distances. Expect big climbs and sweeping views.

Summit 200 is a single loop 200 mile mountain ultramarathon from Frisco, Colorado, with sections above 12,700 feet and about 40,000 ft of elevation gain. Expect remote single track, limited aid, a 110 hour cutoff and a 75 runner cap requiri..

Take on high alpine trails at Sheep Mountain Trail Runs in Fairplay Colorado with half marathon, 50k and 50 mile options across dirt roads, forest tracks and technical rocky sections above 10,600 feet. Small field, well stocked aid stations..

Run a scenic mountain 50K or 10K from Winter Park Resort into town with flowing singletrack, aspen groves and views of the Continental Divide. Expect changing high altitude conditions, full 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+.