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Friends of the National Center Science Stride 5K
Boulder, CO
Friday, May 1st, 2026
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DU Spring Sprint 5k
Gunnison, CO
Saturday, May 2nd, 2026
Greenland Trail Races
Larkspur, CO
Adams County Foster Care 5K Run/Walk and 1 mile...
Brighton, CO
22nd Annual Bob Turner Classic 5K Run/Walk
Berthoud, CO
High Line Canal 5K/10K Run
Centennial, CO
Nielson Challenge
Colorado Springs, CO
Walk Run or Roll for Daniel
MayFest Fun Run
Parachute, CO
9th edition CollaBEERation 5k & Brew Fest Party
Longmont, CO
Frank Shorter Track Classic
Sunday, May 3rd, 2026
Longmont Half & 5k (LM Half)
Water Wells for Africa 5k Walk/Run
Silt, CO
The Colorado Marathon
Fort Collins, CO
RMRR May Trophy Series
Denver, CO
2026 Altitude Elementary Moose Mudder
Aurora, CO
Rise Against Suicide’s Emerge 5K
Hayden Cog Run
Hayden, CO
Dash & Dine 5k #2
Tuesday, May 5th, 2026
The Great CO74 Trail Run
Kittredge, CO
Saturday, May 9th, 2026
Cherry Creek Race for the Watershed 2026
Run For The Trees - 2 Mile Fun Run
Loveland, CO
Run for the Trees - BSBF 2-Mile Run
Hometown Half Marathon & 5k/10k - Colorado Springs
Kadet Football 5K
Parker Parks and Recreation Miles over the Mead...
Parker, CO
Women's Distance Festival 5K
Colterris Wine Run 5k
Palisade, CO
HRCA Mother's Day 5K
Highlands Ranch, CO
Quad Rock 25 & 50 Mile Trail Races
Bellvue, CO
2026 Five Star 5K, Mile of Smiles, and Wellness...
Colorado Women's Classic - Westminster
Westminster, CO
Sunday, May 10th, 2026
Hometown Half Marathon & 5k/10k - Denver
Denver Mother's Day 5K
Super Mom 5K/10K/Half - Colorado Springs
Gluten Free Gallop 5K
Littleton, CO
Saturday, May 16th, 2026
The HIKE
Cascade, CO
Growing Home - Colfax Fundraiser
Girls on the Run 5K at Colfax - Running Buddies...
Endure Trail Runs
Divide, CO
Black Canyon Ascent
Montrose, CO
Spirit Challenge Run for Autism 10k and 5k
Steamboat Springs, CO
Canine On the Creek
Dumont, CO
Sunday, May 17th, 2026
Girls on the Run Rockies Colfax SoleMates 2026
Healing Warriors Program 2026 Annual 5K Fun Run
Miles for Smiles 5K
Arvada, CO
AdventHealth Race to Rebuild
Lone Tree, CO
Wednesday, May 20th, 2026
GMR Backyard Ultra
Golden, CO
Saturday, May 23rd, 2026
Mile High Mile
Farish Trail Race
Woodland Park, CO
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