Washington Half Marathons

149 upcoming half marathons across Washington, updated nightly. Want radius search and maps? Open these in the Race Finder.

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When to race: half marathons in Washington

Washington has 149 upcoming half marathons over the next 12 months. Among complete calendar months, May 2027 has the most listed races, with 19. Most are around Seattle, Everett, Vancouver. The next one is Gobbler 5K, 10K & 13.1M at Olympia, WA (46) on November 14 in Olympia.

November 2026

December 2026

January 2027

February 2027

March 2027

April 2027

May 2027

June 2027

July 2027

August 2027

September 2027

October 2027

November 2027

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More Washington: Marathons · 5K Races · 10K Races · Ultras · All Washington races · Browse by state