Colorado Triathlon Calendar 2025-2026

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Explore the best triathlons in Colorado for 2025-2026! Our updated list features 354 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!

November 2025
Nov
8
Saturday

Bell Ringer 4 Miler

4 mi
Nov
8
Saturday

HRCA Backcountry Wilderness Half Marathon

Trail Run 13 mi
Nov
8
Saturday

Alamosa Veterans Memorial Park Race

5 km 10 km
Nov
15
Saturday

Louisville Trail Race

Trail Run 5 km 10 km 13 mi
Nov
22
Saturday

Turkey Trek 10k

5 km 10 km
Nov
22
Saturday

Colorado Cold Rush Ultra

Trail Run 10 km 13 mi 50 km
Nov
27
Thursday

Pelican Lakes Turkey Trot

5 km
Nov
27
Thursday

Broomfield Turkey Day 10K

5 km 10 km
Nov
27
Thursday

Gobble Wobble Run

5 km
Nov
27
Thursday

Parker Parks and Recreation Turkey Day 5K

5 km
Nov
27
Thursday

BVSC Turkey Trot 5K

5 km
Nov
27
Thursday

Mile High United Way Turkey Trot

4 mi
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
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