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HRCA St. Patrick's Day 5K
Highlands Ranch, CO
Saturday, March 14th, 2026
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8th Annual ☘️ShamROCK Stampede 5k & RRCA 10k St...
Castle Rock, CO
Erin Go Bragh 7.77k
Westminster, CO
Lucky Leprechaun 5K
Boulder, CO
Sunday, March 15th, 2026
All-Out Spring Fever
Golden, CO
Sunday, March 22nd, 2026
Central Park 5k
Denver, CO
The City Park Circuit, Presented by New Balance
Saturday, March 28th, 2026
New Terrain Table Traverse
Sunday, March 29th, 2026
RMRR Spring Marathon Training Series #1
Thornton, CO
Nielson Challenge
Colorado Springs, CO
Saturday, April 4th, 2026
Erie Easter Bunny Hop
Erie, CO
Three Creeks Half Marathon
Englewood, CO
Sunday, April 5th, 2026
Dash for Detection: Oral Cancer Awareness 5K
Saturday, April 11th, 2026
RMRR Spring Marathon Training Series #2
Rockin on the River 5K
Littleton, CO
ASDAsh 5K to Beat Tooth Decay
Aurora, CO
Run Through The Decades 6K/7K/8K/Half - Colorad...
Spring Fling Prairie Dog Half, 10k, & 5k
Arvada, CO
Sunday, April 12th, 2026
RMRR April Trophy Series
Hop Into Spring 5K - Denver
Healthy Kids Running Series Spring 2026 - Auror...
Healthy Kids Running Series Spring 2026 - Denve...
Donut Dash
Prairie Dog Run Series
Louisville, CO
Platte River Half-Marathon, Relay & 5k
Donot Stop Half Marathon (5k/10k) - Colorado Sp...
Saturday, April 18th, 2026
All-Out Beat the Heat
Kerr Gulch Amble
Evergreen, CO
DoNot Stop Half Marathon (5k/10k) - Denver
Sunday, April 19th, 2026
Fairmount Fit Fest
Hot Laps - Denver
Friday, April 24th, 2026
Alpine Autism Center 19th Annual "Run for the O...
Saturday, April 25th, 2026
Runs With Scissors Races
Brighton, CO
Blue Heron Half & 5K
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
Greenland Trail Races
Larkspur, CO
Saturday, May 2nd, 2026
Walk Run or Roll for Daniel
High Line Canal 5K/10K Run
Centennial, CO
Adams County Foster Care 5K Run/Walk and 1 mile...
RMRR May Trophy Series
Sunday, May 3rd, 2026
2026 Altitude Elementary Moose Mudder
Emerge 5K
Dash & Dine 5k #2
Tuesday, May 5th, 2026
Parker Parks and Recreation Miles over the Mead...
Parker, CO
Saturday, May 9th, 2026
HRCA Mother's Day 5K
The Great CO74 Trail Run
Kittredge, CO
Women's Distance Festival 5K
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