0020

Half Marathons Found In Washington in October

View all ↓

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

🚀Boosted

Haunted 5K, 10K, & Half Marathon at Chiawana Park, Pasco, WA (42) 60

Pasco, Washington
18 Oct 25
$33.80 - $70.90
🚀Boosted

Girlfriends Run

Vancouver, Washington
12 Oct 25
Free - $102.44
Feature your event at the top of the results

Want more bookings?

Our most effective tool for getting more people to your race is a ‘Boost’. Boosts put your event to the top of the search results.

Typically a Boosted event gets 8x as many Impressions, 4x as many Clicks and generates 4x more revenue than a standard event listing.

Choose to Boost your event on the landing page which best suits your target audience and budget. For example, ‘10k’s near San Francisco or ‘marathons in April’. Our team can advise on scheduling promotions to optimize performance.

Prices start at $100 per month. The most popular categories sell out in advance so booking early is recommended.

Get in touch

Hi, I'm Rosie from findarace.com!

If you're looking to boost your event or have any questions, please fill in your details below and I'll be in touch to help you.

Cheers to Oktoberfest Run 5K/10K/13.1 SEATTLE

Seattle, Washington
04 Oct 25
$32.80 - $52.94

Run for Donuts 5K/10K/13.1 SEATTLE

Seattle, Washington
04 Oct 25
$32.80 - $52.94

Run for the Gnomes Half Marathon & 10K

Maple Valley, Washington
04 Oct 25
$54.00 - $91.10

Haunted 5K, 10K, & Half Marathon at Langus Riverfront Park, Everett, WA (40) 60

Everett, Washington
04 Oct 25
$33.80 - $70.90

Poulsbo Half Marathon & 10k

Poulsbo, Washington
05 Oct 25
$86.97 - $113.97

Haunted 5K, 10K, 13.1 & 26.2 at Heritage Park, Olympia, WA (41) 80

Olympia, Washington
11 Oct 25
$33.80 - $97.40

Haunted 5K, 10K, & 13.1 at McCollum Park, Everett, WA (41) 30

Everett, Washington
11 Oct 25
$33.80 - $70.90

Falla Walla Half Marathon, 10K & Heroes 5K Run

Walla Walla, Washington
11 Oct 25
$54.00 - $75.20

Girlfriends Run

Vancouver, Washington
12 Oct 25
Free - $102.44

The Spokane Marathon

Spokane, Washington
12 Oct 25 - 19 Oct 25
$22.20 - $144.10

Sun City Barry James Memorial 5K and Half Marathon

Yakima, Washington
12 Oct 25
$16.90 - $22.20

Run Against Breast Cancer 5K/10K/13.1 SEATTLE

Seattle, Washington
18 Oct 25
$32.80 - $52.94

International Sloth Day Run 5K/10K/13.1 SEATTLE

Seattle, Washington
18 Oct 25
$32.80 - $52.94

Lake Washington Half Marathon

Kirkland, Washington
18 Oct 25
$56.73 - $102.09

Haunted 5K, 10K, 13.1 & 26.2 at Lowell Riverfront Park, Everett, WA (42) 80

Everett, Washington
18 Oct 25
$33.80 - $97.40

Haunted 5K, 10K, & Half Marathon at Chiawana Park, Pasco, WA (42) 60

Pasco, Washington
18 Oct 25
$33.80 - $70.90

The Salty Half and 10K too!

Seattle, Washington
18 Oct 25
$42.34

Haunted 5K, 10K, & Half Marathon at Liberty Park, Spokane, WA (43) 30

Spokane, Washington
25 Oct 25
$33.80 - $70.90

Haunted 5K, 10K, & Half Marathon at Heritage Park, Olympia, WA (43) 80

Olympia, Washington
25 Oct 25
$33.80 - $70.90

Tri-Cities Marathon

Richland, Washington
26 Oct 25
$75.00 - $180.00
Showing 1-20 of 20 results

Win
every
month

Sign-up to our email newsletter and you'll be automatically entered into a monthly prize draw to win running kit, from award-winning tech to the latest running shoes. This month it's the Shokz OpenRun Pro 2 headphones worth $180

By signing up you agree to our privacy policy and terms

Image: © Shokz