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Washington Running Calendar 2025-2026

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Monthly updates for Washington

Get new running races (and updates) in your inbox every month.

Explore the best running races in Washington for 2025-2026! Our updated list features 357 exciting races across the region. Find your next race in Washington below and join the running community at these great events!

Half Marathons Marathons Trail Runs Triathlons
May 2026
May
17
Su

Windermere Marathon

5 km 10 km Half Marathon Marathon
May
17
Su

Run or Wine 5K Series

5 km 10 km
May
23
Sa

Leavenworth Trail Fest

Trail Run 5 km 27 km 55 km
May
23
Sa

The Best Races - Seattle

5 km 10 km 13 km
May
23
Sa

US Road Running - Olympia

5 km 10 km Half Marathon
May
23
Sa

US Road Running - Camas

5 km 10 km Half Marathon
May
23
Sa

US Road Running - Spokane

2 mi
May
23
Sa

L.O.S - Last One Standing

Backyard Ultra 4 mi
May
23
Sa

Medical Lake Triathlon

Triathlon
May
23
Sa

The Freedom 50

Trail Run 31 mi 50 mi
May
23
Sa

Sri Chinmoy 13 Hour Ultra

Backyard Ultra 7 hr 13 hr
May
30-31
Sa - Su

Echo Valley

Trail Run 10 km Half Marathon 50 km
May
30
Sa

Run to End Weekend Hunger 5K

5 km
May
30
Sa

Big River Pasco

5 km 10 km Half Marathon
May
30
Sa

Mud Mountain Dam Marathon

5 km Half Marathon Marathon
May
30
Sa

Rhinos 5K Fun Run

5 km
May
30
Sa

Lake Tye Challenge

Trail Run 3 hr 6 hr 12 hr
May
31
Su

Evergreen Half Marathon

5 mi 13 mi
May
31
Su

Run the 509

5 km 10 km Half Marathon
May
31
Su

OTILLO Swimrun Orcas Island

Aquathlon