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Friends of the National Center Science Stride 5K
Boulder, CO
Friday, May 1st, 2026
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Adams County Foster Care 5K Run/Walk and 1 mile...
Brighton, CO
Saturday, May 2nd, 2026
CollaBEERation 5k & Brew Fest Party
Longmont, CO
22nd Annual Bob Turner Classic 5K Run/Walk
Berthoud, CO
Longmont Half & 5k (LM Half)
Sunday, May 3rd, 2026
Emerge 5K
The Colorado Marathon
Fort Collins, CO
Frank Shorter Track Classic
Dash & Dine 5k #2
Tuesday, May 5th, 2026
10th Annual Fort Collin's Mother's Day 5K
Saturday, May 9th, 2026
2026 Five Star 5K, Mile of Smiles, and Wellness...
Colorado Women's Classic - Westminster
Westminster, CO
Sunday, May 10th, 2026
Know. Grow. GO RUN. 5K
Loveland, CO
Friday, May 15th, 2026
Dog Jog
Cheyenne, WY
Saturday, May 16th, 2026
Healing Warriors Program 2026 Annual 5K Fun Run
Sunday, May 17th, 2026
Miles for Smiles 5K
Arvada, CO
Dash4Hope 2026
Greeley, CO
Saturday, May 30th, 2026
J-Town Jog 5K and Jr 1 Mile Dash
Johnstown, CO
Saturday, June 6th, 2026
Berthoud Day 5K
StepUp For Women And Recovery
Colorado 13er (Half Marathon/10k/5k)
Louisville, CO
Sunday, June 7th, 2026
All-Out Summer Breeze
Saturday, June 13th, 2026
Treat Trot Denver
Thornton, CO
Tutu Dash 5K
Broomfield, CO
Muddy Dash | Denver 2026
Dacono, CO
Saturday, June 20th, 2026
Sierra's 5K Run/Walk Race Against Meningitis
Unicorn 5k (North)
Red, White and Brew 5k, 10k, Half Marathon & 12...
Windsor, CO
Father's Day Classic 10k, 5k, & 1 Mile
Sunday, June 21st, 2026
14th Annual Buffs4Life Kyle MacIntosh Memorial ...
Sunset Trail Running Festival
The Red Schoolhouse Run
Tuesday, June 23rd, 2026
Timberview Trail Run
Bellvue, CO
Saturday, June 27th, 2026
FireKracker 5k
Saturday, July 4th, 2026
Greeley Freedom 5k Walk & Run
Loveland Liberty 5K
Let Freedom Run 5k - LONGMONT
Let Freedom Run 5k/10k - Louisville
BRR All-Comers Summer Track & Field Series #3
Thursday, July 9th, 2026
Will Run for Cannoli 5K
Saturday, July 11th, 2026
All-Out Dog Days
One Is Too Many: Veteran Suicide Awareness 5k a...
Sunday, July 19th, 2026
Flyin' Ryan Memorial 5k
Friday, July 24th, 2026
Eltuck Valley 5K - Lory Summer Trail Series
Tuesday, August 4th, 2026
Choice City Running Festival
Friday, August 7th, 2026
Summer Sizzler- Denver
Saturday, August 8th, 2026
All-Out Runapalooza
Sunrise Stampede
Saturday, August 15th, 2026
Erie Half & 5k
Erie, CO
Sunday, August 16th, 2026
Into the Hills Eltuck 5k
Tuesday, August 18th, 2026
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