Upcoming Races Near Thornton, CO in May, 2026

Name: DRMABPsi 1–5K Walk, Run & Roll
Start: 2026-05-30
End: 2026-05-30
Location: Denver

Friends of the National Center Science Stride 5K

Boulder, CO

Friday, May 1st, 2026

Featured

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

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FireKracker 5K Training

Fort Collins, CO

Saturday, May 2nd, 2026

View details for race FireKracker 5K Training

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

Brighton, CO

Saturday, May 2nd, 2026

1 Mile

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

High Line Canal 5K/10K Run

Centennial, CO

Saturday, May 2nd, 2026

10K

View details for race High Line Canal 5K/10K Run

22nd Annual Bob Turner Classic 5K Run/Walk

Berthoud, CO

Saturday, May 2nd, 2026

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

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

Greenland Trail Races

Larkspur, CO

Saturday, May 2nd, 2026

Ultra

Trail

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Rise Against Suicide - Emerge 5K

Boulder, CO

Sunday, May 3rd, 2026

View details for race Rise Against Suicide - Emerge 5K

RMRR May Trophy Series

Denver, CO

Sunday, May 3rd, 2026

Fast

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Longmont Half & 5k (LM Half)

Longmont, CO

Sunday, May 3rd, 2026

Half

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Frank Shorter Track Classic

Longmont, CO

Sunday, May 3rd, 2026

1 Mile

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The Colorado Marathon

Fort Collins, CO

Sunday, May 3rd, 2026

Marathon

Half

10K

View details for race The Colorado Marathon

2026 Altitude Elementary Moose Mudder

Aurora, CO

Sunday, May 3rd, 2026

View details for race 2026 Altitude Elementary Moose Mudder

Dash & Dine 5k #2

Boulder, CO

Tuesday, May 5th, 2026

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

Cherry Creek Race for the Watershed 2026

Aurora, CO

Saturday, May 9th, 2026

View details for race Cherry Creek Race for the Watershed 2026

The Great CO74 Trail Run

Kittredge, CO

Saturday, May 9th, 2026

12K

View details for race The Great CO74 Trail Run

HRCA Mother's Day 5K

Highlands Ranch, CO

Saturday, May 9th, 2026

View details for race HRCA Mother's Day 5K

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

Brighton, CO

Saturday, May 9th, 2026

1 Mile

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

Parker Parks and Recreation

Parker, CO

Saturday, May 9th, 2026

1 Mile

View details for race Parker Parks and Recreation

Run for the Trees - BSBF 2-Mile Run

Loveland, CO

Saturday, May 9th, 2026

View details for race Run for the Trees - BSBF 2-Mile Run

10th Annual Fort Collin's Mother's Day 5K

Fort Collins, CO

Saturday, May 9th, 2026

View details for race 10th Annual Fort Collin's Mother's Day 5K

Colorado Women's Classic - Westminster

Westminster, CO

Sunday, May 10th, 2026

10K

10 Miles

View details for race Colorado Women's Classic - Westminster

Denver Mother's Day 5K

Denver, CO

Sunday, May 10th, 2026

View details for race Denver Mother's Day 5K

Hometown Half Marathon & 5k/10k - Denver

Denver, CO

Sunday, May 10th, 2026

10K

Half

View details for race Hometown Half Marathon & 5k/10k - Denver

Hometown Half Marathon & 5k/10k - Denver

Littleton, CO

Sunday, May 10th, 2026

1 Mile

10K

View details for race Hometown Half Marathon & 5k/10k - Denver

Know. Grow. GO RUN. 5K

Loveland, CO

Friday, May 15th, 2026

Trail

View details for race Know. Grow. GO RUN. 5K

Girls on the Run 5K at Colfax - Running Buddies...

Denver, CO

Saturday, May 16th, 2026

View details for race Girls on the Run 5K at Colfax - Running Buddies and Volunteers

Gluten Free Gallop 5K

Littleton, CO

Saturday, May 16th, 2026

View details for race Gluten Free Gallop 5K

Growing Home - Colfax Fundraiser

Denver, CO

Saturday, May 16th, 2026

View details for race Growing Home - Colfax Fundraiser

Girls on the Run Rockies Colfax SoleMates 2026

Denver, CO

Sunday, May 17th, 2026

Marathon

Half

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Healing Warriors Program 2026 Annual 5K Fun Run

Fort Collins, CO

Sunday, May 17th, 2026

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

Miles for Smiles 5K

Arvada, CO

Sunday, May 17th, 2026

Trail

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Canine On the Creek

Dumont, CO

Sunday, May 17th, 2026

1 Mile

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AdventHealth Race to Rebuild

Lone Tree, CO

Wednesday, May 20th, 2026

1 Mile

View details for race AdventHealth Race to Rebuild

GMR Backyard Ultra

Golden, CO

Saturday, May 23rd, 2026

View details for race GMR Backyard Ultra

Mile High Mile

Boulder, CO

Saturday, May 23rd, 2026

1 Mile

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Race Day Support Add-On

Boulder, CO

Wednesday, May 27th, 2026

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Dash4Hope 2026

Greeley, CO

Saturday, May 30th, 2026

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Weld Your Mettle Running Festival

Eaton, CO

Saturday, May 30th, 2026

Ultra

Marathon

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DRMABPsi 1–5K Walk, Run & Roll

Denver, CO

Saturday, May 30th, 2026

View details for race DRMABPsi 1–5K Walk, Run & Roll

Explore more in Thornton, CO

Distances:

5K 10K Half Marathon Marathon

Months:

April May June

Tags:

Trail Boston Qualifiers Fast Courses

State:

All Colorado races

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