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Upcoming Races Near Thornton, CO in March, 2026

Lee Martinez Park T&H 10K

Fort Collins, CO

Sunday, March 1st, 2026

Featured

10K

View details for race Lee Martinez Park T&H 10K

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RMRR March Trophy Series

Littleton, CO

Sunday, March 1st, 2026

5K

Fast

View details for race RMRR March Trophy Series

4th Anniversary Beer and Donut Hole Miles

Arvada, CO

Saturday, March 7th, 2026

1 Mile

View details for race 4th Anniversary Beer and Donut Hole Miles

St. Paddy's Day Run

Berthoud, CO

Saturday, March 14th, 2026

5K

View details for race St. Paddy's Day Run

Sharin' O' The Green 5k

Fort Collins, CO

Saturday, March 14th, 2026

5K

Fast

View details for race Sharin' O' The Green 5k

HRCA St. Patrick's Day 5K

Highlands Ranch, CO

Saturday, March 14th, 2026

5K

View details for race HRCA St. Patrick's Day 5K

Lucky Brew Race 5K, 10K, 15k & Half Marathon

Severance, CO

Saturday, March 14th, 2026

5K

10K

15K

View details for race Lucky Brew Race 5K, 10K, 15k & Half Marathon

Erin Go Bragh 7.77k

Westminster, CO

Saturday, March 14th, 2026

View details for race Erin Go Bragh 7.77k

Lucky Leprechaun 5K

Boulder, CO

Sunday, March 15th, 2026

5K

View details for race Lucky Leprechaun 5K

Lucky Brew Race 5K, 10K, and 15K

Windsor, CO

Saturday, March 21st, 2026

5K

10K

15K

Trail

View details for race Lucky Brew Race 5K, 10K, and 15K

Central Park 5k

Denver, CO

Sunday, March 22nd, 2026

5K

Fast

View details for race Central Park 5k

All-Out Spring Fever

Golden, CO

Sunday, March 22nd, 2026

Half

10K

5K

Trail

View details for race All-Out Spring Fever

The City Park Circuit

Denver, CO

Saturday, March 28th, 2026

Fast

View details for race The City Park Circuit

Cryogenic Cannibal Chase

Estes Park, CO

Saturday, March 28th, 2026

View details for race Cryogenic Cannibal Chase

RMRR Spring Marathon Training Series #1

Thornton, CO

Sunday, March 29th, 2026

10 Miles

Ultra

View details for race RMRR Spring Marathon Training Series #1

Explore more in Thornton, CO

Distances:

5K 10K Half Marathon Marathon

Months:

February March April

Tags:

Trail Boston Qualifiers Fast Courses

State:

All Colorado races

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