Washington Triathlon Calendar 2025-2026

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Explore the best triathlons in Washington for 2025-2026! Our updated list features 306 exciting races across the region. Find your next race in Washington below and join the running community at these great events!

March 2026
Mar
14
Saturday

Frosty Moss Relay

30 mi 50 km 80 mi
Mar
14
Saturday

The Best Races - Seattle

5 km 10 km 13 mi
Mar
14
Saturday

US Road Running - Olympia

5 km 10 km 15 km 21 km
Mar
21
Saturday

Dash Point Trail Run

Trail Run 10 km 13 mi
Mar
22
Sunday

Couve Clover Run

3 mi 7 mi 10 mi
Mar
22
Sunday

Dugan's Run

5 km
Mar
27-28
Fr - Sa

Badger Mountain Challenge - Richland, WA

Trail Run 15 km 55 km ... 100 km 100 mi
Mar
28
Saturday

Yakima River Canyon Marathon

21 km 42 km
Mar
29
Sunday

Mill Town Half Marathon

3 mi 6 mi 13 mi
Mar
29
Sunday

Mill Town Marathon

5 km 10 km 21 km
April 2026
Apr
4
Saturday

The Best Races - Seattle

5 km 10 km 13 mi
Apr
11
Saturday

OAT Run

Trail Run 12 km 21 km 50 km
Apr
11
Saturday

US Road Running - Olympia

5 km 10 km 21 km
Apr
17-18
Fr - Sa

Run the River - Kennewick, WA

5 km 21 km 42 km
Apr
18
Saturday

Wenatchee Marathon

5 km 10 km 21 km 42 km
Apr
18
Saturday

Run With the Goats

Trail Run 50 km
Apr
18
Saturday

Squak Mountain Trail Run

Trail Run 12 km 21 km 50 km
Apr
25
Saturday

Sunflower Relay, Half Marathon and Marathon

Trail Run 13 mi 26 mi
Apr
25
Saturday

Leavenworth Firefighter Challenge

Trail Run
Apr
25
Saturday

The Best Races - Seattle

5 km 10 km 13 mi
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