Upcoming 5K Races Near Thornton, CO

Cinco De Mayo Run: Against All Odds DENVER/AURORA

Centennial, CO

Saturday, May 3rd, 2025

21st Annual Bob Turner Classic 5k Run/Walk

Berthoud, CO

Saturday, May 3rd, 2025

Cinco De Mayo Run: Against All Odds DENVER/AURORA

Aurora, CO

Saturday, May 3rd, 2025

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

Brighton, CO

Saturday, May 3rd, 2025

The Colorado Marathon

Fort Collins, CO

Sunday, May 4th, 2025

RMRR May Trophy Series

Denver, CO

Sunday, May 4th, 2025

Fairmount 5k

Golden, CO

Sunday, May 4th, 2025

Longmont Half & 5k (LM Half)

Longmont, CO

Sunday, May 4th, 2025

2025 Altitude Elementary Moose Mudder

Aurora, CO

Sunday, May 4th, 2025

Dash & Dine 5k #2

Boulder, CO

Tuesday, May 6th, 2025

Muddy Dash | Denver

Erie, CO

Saturday, May 10th, 2025

2025 Gluten Free Gallop 5K

Littleton, CO

Saturday, May 10th, 2025

DoNot Stop Half Marathon (5k/10k) - Denver

Littleton, CO

Saturday, May 10th, 2025

HRCA Mother's Day 5K

Highlands Ranch, CO

Saturday, May 10th, 2025

MomCo Virtual Mother's Day Run

Denver, CO

Saturday, May 10th, 2025

DoNot Stop Half Marathon (5k/10k) - Denver

Denver, CO

Saturday, May 10th, 2025

Parker Parks and Recreation Miles over the Mead...

Parker, CO

Saturday, May 10th, 2025

Colorado Women's Classic - Westminster

Westminster, CO

Sunday, May 11th, 2025

Frank Shorter Track Classic

Longmont, CO

Sunday, May 11th, 2025

Denver Mother's Day 5K

Denver, CO

Sunday, May 11th, 2025

Dash & Dine 5k #3

Boulder, CO

Tuesday, May 13th, 2025

Know. Grow. GO RUN. 5K

Loveland, CO

Friday, May 16th, 2025

Canine On the Creek

Dumont, CO

Saturday, May 17th, 2025

Miles for Smiles 5K

Arvada, CO

Sunday, May 18th, 2025

Dash & Dine 5k #4 - Series Finale

Boulder, CO

Tuesday, May 20th, 2025

Flamingo Day 5K

Denver, CO

Sunday, June 1st, 2025

Stepping Stone 5K

Littleton, CO

Sunday, June 1st, 2025

Colorado 13er (Half Marathon/10k/5k)

Louisville, CO

Sunday, June 1st, 2025

The Big Run Presented by Brooks

Littleton, CO

Wednesday, June 4th, 2025

All-Out Summer Breeze

Arvada, CO

Saturday, June 7th, 2025

J-Town Jog 5K and Mile

Johnstown, CO

Saturday, June 7th, 2025

StepUp For Women And Recovery

Fort Collins, CO

Saturday, June 7th, 2025

Sierra's 5K Run/Walk Race Against Meningitis

Loveland, CO

Saturday, June 14th, 2025

Cherry Creek Race for the Watershed 2025

Aurora, CO

Saturday, June 14th, 2025

Parker Parks and Recreation Dash Across the Dam...

Parker, CO

Saturday, June 14th, 2025

Father's Day Classic 10k, 5k, & 1 Mile

Arvada, CO

Sunday, June 15th, 2025

Footsteps for Families 5k Fun Run & Concert

Windsor, CO

Friday, June 20th, 2025

Hometown Half Marathon & 5k/10k - Denver

Denver, CO

Saturday, June 21st, 2025

Unicorn 5k (North)

Thornton, CO

Saturday, June 21st, 2025

Bubble Run | Denver | June 21st

Commerce City, CO

Saturday, June 21st, 2025

Hometown Half Marathon & 5k/10k - Denver

Westminster, CO

Saturday, June 21st, 2025

Red, White and Brew 5k, 10k, Half Marathon & 12...

Windsor, CO

Saturday, June 21st, 2025

13th Annual Buffs4Life Kyle MacIntosh Memorial ...

Boulder, CO

Sunday, June 22nd, 2025

Sunset Trail Running Festival

Boulder, CO

Sunday, June 22nd, 2025

Healing Warriors 4th Annual 5K Fun Run

Fort Collins, CO

Sunday, June 22nd, 2025

Healing Warriors Program 2025 Annua...

Fort Collins, CO

Sunday, June 22nd, 2025

13th Annual Buffs4Life 5k Walk/Run

Boulder, CO

Sunday, June 22nd, 2025

Sunny Stride 5 K

Westminster, CO

Thursday, June 26th, 2025

Sunny Stride 5 K

Broomfield, CO

Thursday, June 26th, 2025

Before The Fourth 5k

Littleton, CO

Saturday, June 28th, 2025