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Triathlon Calendar near Denver 2025-2026

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

February 2026
Feb
14
Saturday

Heart Throb 5K

5 km
Feb
22
Sunday

Highlands Ranch 5k

5 km
Feb
22
Sunday

Mardi Crawl

5 km 10 km 13 mi
March 2026
Mar
14
Saturday

Erin Go Bragh 7.77k

7 km
Mar
22
Sunday

Central Park 5k

5 km
Mar
22
Sunday

All-Out Spring Fever

5 km 10 km 13 mi
April 2026
Apr
12
Sunday

Donut Dash - Denver

5 km
Apr
12
Sunday

Platte River Half-Marathon

13 mi
Apr
18
Saturday

All-Out Beat the Heat

5 km 10 km 13 mi
Apr
25
Saturday

Runs With Scissors Races

13 mi 26 mi 50 km
Apr
26
Sunday

Unicorn 5k

2 mi 5 km
May 2026
May
2-9
Sa - Sa

Niwot's Challenge

Trail Run 24 mi 50 mi 100 mi
May
10
Sunday

Colorado Women's Classic

5 km 10 km 10 mi
May
16-17
Sa - Su

Denver Colfax Marathon

10 mi 13 mi 26 mi
June 2026
Jun
7
Sunday

Flamingo Day 5K

5 km
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