Colorado Running calendar 2025-2026

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Explore the best running races in Colorado for 2025-2026! Our updated list features 318 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!

November 2025
Nov
27
Thursday

BVSC Turkey Trot 5K

5 km
Nov
28
Friday

Christmas Mountain Run

5 mi
December 2025
Dec
6
Saturday

Sawmill Trail Runs

Trail Run 8 mi 16 mi 50 km
Dec
6
Saturday

Toy Drop

5 km 10 km 15 km
Dec
6
Saturday

All-Out Fa La La

5 km 10 km 13 mi
Dec
6
Saturday

Chasing Santa 5k

5 km
Dec
6
Saturday

Thumbs Up Vertical Challenge

Trail Run
Dec
7
Sunday

Rock Canyon Half Marathon

5 km 13 mi
Dec
7
Sunday

RMRR December Trophy Series

4 mi
Dec
13
Saturday

WinterFest 5k

5 km
Dec
20
Saturday

Santa's Dash for Cash

5 km
Dec
21
Sunday

Ugly Sweater 5K - Denver

5 km
Dec
27
Saturday

Candy Cane Course - Denver

5 km 12 km
Dec
28
Sunday

Candy Cane Course

5 km 12 km
Dec
31
Wednesday

Resolution Run - Fort Collins

5 km
January 2026
Jan
1
Thursday

Resolute Runner 5k

5 km
Jan
10
Saturday

Polar Prowl

5 km 10 km 13 mi
Jan
24-25
Sa - Su

USCSA Cross Country Ski Racing Festival

Trail Run 3 km 7 km 15 km
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