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Platte River Half-Marathon and Relay
Littleton, CO
Sunday, April 12th, 2026
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Great Western Trail Race
Severance, CO
Saturday, April 18th, 2026
All-Out Beat the Heat
Westminster, CO
Horsetooth Half Marathon - Presented by Fort Co...
Fort Collins, CO
Sunday, April 19th, 2026
Pueblo Spring Runoff
Pueblo, CO
Sunday, April 26th, 2026
Greenland Trail Races
Larkspur, CO
Saturday, May 2nd, 2026
Quad Rock 25 & 50 Mile Trail Races
Bellvue, CO
Saturday, May 9th, 2026
The HIKE
Cascade, CO
Saturday, May 16th, 2026
Endure Trail Runs
Divide, CO
Spirit Challenge Run for Autism 10k and 5k
Steamboat Springs, CO
Miles for Smiles 5K
Arvada, CO
Sunday, May 17th, 2026
Farish Trail Race
Woodland Park, CO
Saturday, May 23rd, 2026
The Narrow Gauge Races
Durango, CO
Sunday, May 24th, 2026
Summits Trail Runs
Granby, CO
Saturday, June 6th, 2026
Colorado 13er (Half Marathon/10k/5k)
Louisville, CO
Sunday, June 7th, 2026
DU Dash Colorado
Palmer Lake, CO
All-Out Summer Breeze
Saturday, June 13th, 2026
Howelsen Hill Trail Run
Tutu Dash 5K
Broomfield, CO
Garden of the Gods 10 Mile/10K and Trail Run
Colorado Springs, CO
Sunday, June 14th, 2026
Sunset Trail Running Festival
Boulder, CO
Sunday, June 21st, 2026
Race in the Clouds - Alma Dirt Festival 2026
Alma, CO
Thursday, June 25th, 2026
Timberview Trail Run
Saturday, June 27th, 2026
Pueblo's Firecracker 5k!
Saturday, July 4th, 2026
Hahns Peak Vertical Trail Race
Clark, CO
Sunday, July 5th, 2026
Silverheels Trail Runs
Como, CO
Friday, July 10th, 2026
All-Out Dog Days
Saturday, July 11th, 2026
Spring Creek Memorial Trail Run
Saturday, July 18th, 2026
Summer Splash Prairie Dog Half, 10k, & 5k
Castle Rock, CO
Audi Power of Four Trail Run
Aspen, CO
Barr Trail Mountain Race
Manitou Springs, CO
Sunday, July 19th, 2026
The Hero's Journey 5K
Aurora, CO
Saturday, July 25th, 2026
Kennebec Mountain Run
Hesperus, CO
Saturday, August 1st, 2026
Sheep Mountain Trail Runs
Fairplay, CO
All-Out Runapalooza
Saturday, August 8th, 2026
Into the Hills Eltuck 10k
Tuesday, August 11th, 2026
The Cheyenne Mountain Run
Saturday, August 15th, 2026
Into the Hills Eltuck 5k
Tuesday, August 18th, 2026
Byers Peak Stampede Half Marathon & 5K Run
Fraser, CO
Saturday, August 22nd, 2026
Staunton Rocks! Marathon and Half Marathon
Pine, CO
Eltuck Valley 12K - Lory Summer Trail Series
Tuesday, August 25th, 2026
Continental Divide Trail Run
Saturday, August 29th, 2026
Rocky Mountain 5K presented by School District 11
RexRun For PAWSitivity 2026 Trail Run/Walk
Cirque Series - Arapahoe Basin, CO
Keystone, CO
Saturday, September 5th, 2026
53rd Annual Imogene Pass Run
Telluride, CO
Saturday, September 12th, 2026
Black Squirrel Half Marathon
Trail Sisters Women's Half Marathon & 10k
Buena Vista, CO
Severance Glow 5K Run or Walk
Friday, September 18th, 2026
All-Out Fall Fest
Saturday, September 19th, 2026
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