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Half Marathons in Washington

As of October 6, 2026, Crewable lists 34 upcoming half marathons in Washington from October 2026 to July 2027. The next is Coffee Lovers Run 5K/10K/13.1 SEATTLE on October 10 in Seattle. Registration is open for 26.

Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites

With aid station data

Grand Ridge2 aid

in 32 days

Grand Ridge

Issaquah, WA
50KMarathon+2
Open until Nov 6from $45

Race calendar

October 2026

21 races

  14. Girlfriends Run

    Vancouver, WA
    Half Marathon10K+1
    Open until Oct 19from $50

November 2026

7 races

  2. Grand Ridge

    Issaquah, WA
    50KMarathon+2
    Open until Nov 6from $45

  4. Run the Bay

    University Place, WA
    Half Marathon10K+1
    Open until Nov 8from $52

December 2026

1 race

  1. PIGTAILS RUN

    Maple Valley, WA
    50KMarathon+1
    Closedfrom $35

March 2027

1 race

April 2027

1 race

May 2027

1 race

June 2027

1 race

July 2027

1 race

Quick answers

What is the next half marathon in Washington?

Coffee Lovers Run 5K/10K/13.1 SEATTLE, on Saturday, October 10, 2026, in Seattle. Distances: Half Marathon, 10K, 5K.

How many half marathons in Washington have open registration?

26 of the 34 list registration as open as of October 6, 2026, including Coffee Lovers Run 5K/10K/13.1 SEATTLE, Cookie Run 5K/10K/13.1 SEATTLE and Haunted 5K, 10K & 13.1M at Camas, WA (41).

What is the busiest month for half marathons in Washington?

October 2026, with 21 of the 34. November 2026 follows with 7.

Cities in Washington

Seattle20Bellingham16Spokane20

Neighboring states

Idaho10Oregon11

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