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Obstacle Race Calendar near Thornton 2025-2026

Explore the top obstacle runs near Thornton for 2025-2026! We've gathered 115 exciting races in the area. Check out our detailed list below to find your next local race.

November 2025
Nov
27
Thursday

Mile High United Way Turkey Trot

4 mi
Nov
29
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
December 2025
Dec
6
Saturday

All-Out Fa La La

5 km 10 km 13 mi
Dec
7
Sunday

RMRR December Trophy Series

4 mi
Dec
13
Saturday

WinterFest 5k

5 km
Dec
13
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
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
27
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
January 2026
Jan
1
Thursday

Resolute Runner 5k

5 km
Jan
3
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
Jan
10
Saturday

Polar Prowl

5 km 10 km 13 mi
Jan
17
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
Jan
18
Sunday

Arctic Prairie Dog Half Marathon

5 km 10 km 13 mi
February 2026
Feb
7
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
Feb
14
Saturday

Heart Throb 5K

5 km
Feb
14
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
Feb
22
Sunday

Highlands Ranch 5k

5 km
Feb
22
Sunday

Mardi Crawl

5 km 10 km 13 mi
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