Upcoming Races Near Fort Collins, CO in May, 2026

Friends of the National Center Science Stride 5K

Boulder, CO

Friday, May 1st, 2026

Featured

5K

View details for race Friends of the National Center Science Stride 5K

Want to feature your race?

Get your race seen first by thousands of runners

Learn how to feature your race

22nd Annual Bob Turner Classic 5K Run/Walk

Berthoud, CO

Saturday, May 2nd, 2026

5K

View details for race 22nd Annual Bob Turner Classic 5K Run/Walk

9th edition CollaBEERation 5k & Brew Fest Party

Longmont, CO

Saturday, May 2nd, 2026

5K

View details for race 9th edition CollaBEERation 5k & Brew Fest Party

Adams County Foster Care 5K Run/Walk and 1 mile...

Brighton, CO

Saturday, May 2nd, 2026

5K

1 Mile

View details for race Adams County Foster Care 5K Run/Walk and 1 mile fun run

Longmont Half & 5k (LM Half)

Longmont, CO

Sunday, May 3rd, 2026

Half

5K

View details for race Longmont Half & 5k (LM Half)

Rise Against Suicide - Emerge 5K

Boulder, CO

Sunday, May 3rd, 2026

5K

View details for race Rise Against Suicide - Emerge 5K

The Colorado Marathon

Fort Collins, CO

Sunday, May 3rd, 2026

Marathon

Half

10K

View details for race The Colorado Marathon

Frank Shorter Track Classic

Longmont, CO

Sunday, May 3rd, 2026

1 Mile

5K

View details for race Frank Shorter Track Classic

Dash & Dine 5k #2

Boulder, CO

Tuesday, May 5th, 2026

5K

View details for race Dash & Dine 5k #2

Run For The Trees - 2 Mile Fun Run

Loveland, CO

Saturday, May 9th, 2026

View details for race Run For The Trees - 2 Mile Fun Run

Quad Rock 25 & 50 Mile Trail Races

Bellvue, CO

Saturday, May 9th, 2026

Ultra

Trail

View details for race Quad Rock 25 & 50 Mile Trail Races

2026 Five Star 5K, Mile of Smiles, and Wellness...

Brighton, CO

Saturday, May 9th, 2026

5K

1 Mile

View details for race 2026 Five Star 5K, Mile of Smiles, and Wellness Festival

Colorado Women's Classic - Westminster

Westminster, CO

Sunday, May 10th, 2026

5K

10K

10 Miles

View details for race Colorado Women's Classic - Westminster

Dog Jog

Cheyenne, WY

Saturday, May 16th, 2026

5K

View details for race Dog Jog

Healing Warriors Program 2026 Annual 5K Fun Run

Fort Collins, CO

Sunday, May 17th, 2026

5K

View details for race Healing Warriors Program 2026 Annual 5K Fun Run

Miles for Smiles 5K

Arvada, CO

Sunday, May 17th, 2026

5K

Trail

View details for race Miles for Smiles 5K

Weld Your Mettle Running Festival

Eaton, CO

Saturday, May 30th, 2026

Ultra

Marathon

View details for race Weld Your Mettle Running Festival

Explore more in Fort Collins, CO

Distances:

5K 10K Half Marathon Marathon

Months:

March April May

Tags:

Trail Boston Qualifiers Fast Courses

State:

All Colorado races

Don't see your race? Add it!

Add Your Race (Free)