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Half Marathons Found In Washington in October

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Half Marathons in Washington in October 2025

Find A Race is the US's favourite event listings site. Check out our list of October 2025 Half Marathons in Washington below.

Race Calendar: Half Marathons Found In October

Ninja 1M, 5K, 10K, 15K, & Half Marathon at Heritage Park, Olympia, WA (10-11-2025)

Olympia, Washington
11 Oct 25
$27.50 - $69.90

Girlfriends Run

Vancouver, Washington
12 Oct 25
$47.36 - $542.00

Tri-Cities Marathon

Richland, Washington
26 Oct 25
$55.00 - $140.00
Showing 1-3 of 3 results