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All-Out Spring Fever
Golden, CO
Sunday, March 22nd, 2026
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Central Park 5k
Denver, CO
Dance Marathon 5K
Fort Collins, CO
Sunday, March 29th, 2026
Spring Equinox
Wellington, CO
Erie Easter Bunny Hop
Erie, CO
Saturday, April 4th, 2026
Run the Ranch
Loveland, CO
Friday, April 10th, 2026
Rockin on the River 5K
Littleton, CO
Saturday, April 11th, 2026
Dash for Detection: Oral Cancer Awareness 5K
ASDAsh 5K to Beat Tooth Decay
Aurora, CO
CRMAC Uplift Her - 5K Run/Walk
Platte River Half-Marathon, Relay & 5k
Sunday, April 12th, 2026
Spring Fling Prairie Dog Half, 10k, & 5k
Arvada, CO
Donut Dash
Hop Into Spring 5K - Denver
Great Western Trail Race
Severance, CO
Saturday, April 18th, 2026
All-Out Beat the Heat
Westminster, CO
DoNot Stop Half Marathon (5k/10k) - Denver
Sunday, April 19th, 2026
2026 Fairmount Fit Fest
Bigfoot Half Marathon
Estes Park, CO
Saturday, April 25th, 2026
Blue Heron Half & 5K
Brighton, CO
Sunday, April 26th, 2026
2026 Flying Pig 5K
Unicorn 5k (Denver-East)
Dash & Dine 5k
Boulder, CO
Tuesday, April 28th, 2026
Friends of the National Center Science Stride 5K
Friday, May 1st, 2026
Adams County Foster Care 5K Run/Walk and 1 mile...
Saturday, May 2nd, 2026
22nd Annual Bob Turner Classic 5K Run/Walk
Berthoud, CO
CollaBEERation 5k & Brew Fest Party
Longmont, CO
High Line Canal 5K/10K Run
Centennial, CO
The Colorado Marathon
Sunday, May 3rd, 2026
Rise Against Suicide’s Emerge 5K
Longmont Half & 5k (LM Half)
RMRR May Trophy Series
Frank Shorter Track Classic
2026 Altitude Elementary Moose Mudder
Dash & Dine 5k #2
Tuesday, May 5th, 2026
2026 Five Star 5K, Mile of Smiles, and Wellness...
Saturday, May 9th, 2026
Parker Parks and Recreation Miles over the Mead...
Parker, CO
Cherry Creek Race for the Watershed 2026
HRCA Mother's Day 5K
Highlands Ranch, CO
Denver Mother's Day 5K
Sunday, May 10th, 2026
Hometown Half Marathon & 5k/10k - Denver
Colorado Women's Classic - Westminster
Gluten Free Gallop 5K
Saturday, May 16th, 2026
Miles for Smiles 5K
Sunday, May 17th, 2026
Healing Warriors Program 2026 Annual 5K Fun Run
J-Town Jog 5K and Kids 1 Mile Dash
Johnstown, CO
Saturday, June 6th, 2026
StepUp For Women And Recovery
Flamingo Day 5K
Sunday, June 7th, 2026
Colorado 13er (Half Marathon/10k/5k)
Louisville, CO
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