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Triathlon Calendar near Idaho Springs 2025-2026

Explore the top triathlons near Idaho Springs for 2025-2026! We've gathered 16 exciting races in the area. Check out our detailed list below to find your next local race.

July 2025
Jul
27
Sunday

Spirit of the West 5K

5 km
August 2025
Aug
2
Saturday

All-Out Runapalooza

5 km 10 km 13 mi
Aug
2
Saturday

Boulder Rez Marathon

Trail Run 10 km 13 mi 31 km 26 mi
Aug
9
Saturday

Holy Cow Trail Stampede

Trail Run 5 km
Aug
9
Saturday

Dirt Circus - Boulder

Trail Run 4 mi
Aug
16
Saturday

Summer Sizzler - Denver

5 km 10 km 15 km
Aug
23
Saturday

Westminster Night Trail

Trail Run 5 km 10 km ... 35 km 50 km
Aug
23
Saturday

Boulder Sunset Run

5 km 10 km
Aug
23
Saturday

Staunton Rocks

Trail Run 13 mi 26 mi
Aug
23
Saturday

Byers Peak Stampede Half Marathon

Trail Run 5 km 13 mi
September 2025
Sep
6
Saturday

Cirque Series - Arapahoe Basin

Trail Run 9 mi
Sep
6
Saturday

HRCA Wildcat Mountain Trail Race

Trail Run 10 km 10 mi
Sep
6
Saturday

Devil on the Divide

Trail Run 22 km 50 km
Sep
7
Sunday

Denver Rocks Run 10K

5 km 10 km
Sep
13
Saturday

All-Out Fall Fest

5 km 10 km 13 mi
Sep
13
Saturday

The Denver 5k

5 km
Sep
13
Saturday

Ned Ned Run

Trail Run 5 km 10 km 13 mi
Sep
20
Saturday

Miles 4 Madison 5K

5 km
Sep
21
Sunday

Farmers 5000

5 km
Sep
21
Sunday

Golden Gallop

5 km 10 km
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