Washington Triathlon Calendar 2025-2026

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Explore the best triathlons in Washington for 2025-2026! Our updated list features 293 exciting races across the region. Find your next race in Washington below and join the running community at these great events!

July 2026
Jul
4
Saturday

Bigfoot Fun Run - Yacolt, WA

Trail Run 5 km 10 km
Jul
11
Saturday

Devil's Gulch

Trail Run 21 km 50 mi 100 mi
Jul
17-18
Fr - Sa

Mount Rainier Half Marathon

Trail Run 5 km 10 km 13 mi
Jul
18
Saturday

Lookin For A Cure Seattle

5 km
Jul
19
Sunday

B & O Half Marathon

10 km 21 km
Jul
25
Saturday

University Place Twisted Cider 12K

5 km 12 km
Jul
25-26
Sa - Su

Jack & Jill Downhill Marathon

13 mi 26 mi
August 2026
Aug
1-2
Sa - Su

Volcanic 50

Trail Run 25 km 50 km
Aug
8
Saturday

Larrabee Lakes

Trail Run 12 km 25 km 50 km
Aug
14-18
Fr - Tu

Bigfoot 200 Mile

Trail Run 200 mi
Aug
14
Friday

Bigfoot 20 Mile Run

Trail Run 20 mi
Aug
15
Saturday

One Step Closer

Backyard Ultra 3 hr 6 hr 12 hr 18 hr
Aug
16
Sunday

Sundae Runday

2 mi 5 km 10 km
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