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Running calendar near Boulder 2025-2026

Explore the top running races near Boulder for 2025-2026! We've gathered 52 exciting races in the area. Check out our detailed list below to find your next local race.

January 2025
Jan
19
Sunday

Polar Bear Run

5 km
Jan
19
Sunday

Arctic Prairie Dog Half Marathon

5 km 10 km 13 mi
Jan
25
Saturday

Six Pack Series Winter

5 km
Jan
26
Sunday

Yeti Chase 10k

10 km
February 2025
Feb
1
Saturday

Six Pack Series Winter

5 km 4 mi
Feb
2
Sunday

RMRR Trophy Series - Englewood

5 km 11 km
Feb
2
Sunday

Super Bowl 5K

5 km
Feb
8
Saturday

Six Pack Series Winter

5 km 5 mi
Feb
9
Sunday

Valentine's Day Run

4 mi
Feb
15
Saturday

Sweetheart Classic

4 mi
Feb
15
Saturday

Heart Throb 5K

5 km
Feb
16
Sunday

Ralston Creek Half Marathon

5 km 13 mi
Feb
22
Saturday

Six Pack Series Winter Westminster 10k

5 km 10 km
Feb
22
Saturday

Mardi Crawl

5 km 10 km 13 mi
March 2025
Mar
1
Saturday

Time to Paddy Half Marathon - Denver

5 km 10 km 13 mi
Mar
2
Sunday

That Dam Run Half Marathon

5 km 10 km 13 mi
Mar
2
Sunday

RMRR March Trophy Series

5 km
Mar
8
Saturday

Lucky Lyons

Trail Run 5 km 10 km
Mar
15
Saturday

Erin Go Bragh 7.77k

7 km
Mar
16
Sunday

Lucky Leprechaun 5K

5 km
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