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8th Annual ☘️ShamROCK Stampede 5k & RRCA 10k St...
Castle Rock, CO
Saturday, March 14th, 2026
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HRCA St. Patrick's Day 5K
Highlands Ranch, CO
Lucky Leprechaun 5K
Boulder, CO
Sunday, March 15th, 2026
Central Park 5k
Denver, CO
Sunday, March 22nd, 2026
All-Out Spring Fever
Golden, CO
Erie Easter Bunny Hop
Erie, CO
Saturday, April 4th, 2026
ASDAsh 5K to Beat Tooth Decay
Aurora, CO
Saturday, April 11th, 2026
Dash for Detection: Oral Cancer Awareness 5K
Rockin on the River 5K
Littleton, CO
Hop Into Spring 5K - Denver
Sunday, April 12th, 2026
Platte River Half-Marathon and Relay
Donut Dash
Spring Fling Prairie Dog Half, 10k, & 5k
Arvada, CO
Donot Stop Half Marathon (5k/10k) - Colorado Sp...
Colorado Springs, CO
Saturday, April 18th, 2026
All-Out Beat the Heat
Westminster, CO
Fairmount Fit Fest
Sunday, April 19th, 2026
DoNot Stop Half Marathon (5k/10k) - Denver
Alpine Autism Center 19th Annual "Run for the O...
Saturday, April 25th, 2026
Blue Heron Half & 5K
Brighton, CO
Sunday, April 26th, 2026
Unicorn 5k (Denver-East)
Dash & Dine 5k
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
Walk Run or Roll for Daniel
High Line Canal 5K/10K Run
Centennial, CO
2026 Altitude Elementary Moose Mudder
Sunday, May 3rd, 2026
RMRR May Trophy Series
Emerge 5K
Dash & Dine 5k #2
Tuesday, May 5th, 2026
HRCA Mother's Day 5K
Saturday, May 9th, 2026
2026 Five Star 5K, Mile of Smiles, and Wellness...
Hometown Half Marathon & 5k/10k - Colorado Springs
Women's Distance Festival 5K
Cherry Creek Race for the Watershed 2026
Parker Parks and Recreation Miles over the Mead...
Parker, CO
Super Mom 5K/10K/Half - Colorado Springs
Sunday, May 10th, 2026
Colorado Women's Classic - Westminster
Denver Mother's Day 5K
Hometown Half Marathon & 5k/10k - Denver
Gluten Free Gallop 5K
Saturday, May 16th, 2026
Miles for Smiles 5K
Sunday, May 17th, 2026
Farish Trail Race
Woodland Park, CO
Saturday, May 23rd, 2026
5th Annual Angel Run at Red Leg Brewing
Monday, May 25th, 2026
Aiden's Adventure 5k
Saturday, June 6th, 2026
DU Dash Colorado
Palmer Lake, CO
Sunday, June 7th, 2026
Colorado 13er (Half Marathon/10k/5k)
Louisville, CO
Flamingo Day 5K
Tutu Dash 5K
Broomfield, CO
Saturday, June 13th, 2026
All-Out Summer Breeze
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