You can run a half marathon in Washington in May, June, July, August, September, October, November, and December.
Washington Half Marathons in October
This is the calendar of all the Washington half marathons in October. On these race calendars, not only will you be able to search the basics of cities and dates, but you’ll also be able to find October Washington half marathons by difficulty, scenery, race size, and attributes like whether it’s pet-friendly, stroller-friendly, or has a great finisher party.
If you can’t find the half marathon you’re looking for in Washington in October, it’s possible the race has not updated their date to the current year or has switched months. If you know a race belongs on this calendar or have any edits you’d like to suggest for an existing race in Washington in October, you can email us [email protected].
Filter Washington Half Marathons
Race Size
Difficulty
Scenery
Type
Perfect For
Distances
Filter Washington Half Marathons
Race Size
Difficulty
Scenery
Type
Perfect For
Distances
Featured Race
July 19, 2025
100-500 runners
Olympia, Washington
- Half Marathon, Trail & Road
October 4, 2025
500-1000 runners
Leavenworth, Washington
- Half Marathon, Marathon, Trail & Road
October 5, 2025
100-500 runners
Poulsbo, Washington
- 10K, Half Marathon, Road
October 11, 2025
100-500 runners
Walla Walla, Washington
- 10K, Half Marathon, Trail
October 12, 2025
100-500 runners
Vancouver, Washington
- 10K, Half Marathon, Road
October 12, 2025
500-1000 runners
Snohomish, Washington
- Half Marathon, Marathon, Trail & Road
October 12, 2025
500-1000 runners
Spokane, Washington
- 10K, Half Marathon, Marathon, Trail & Road
October 18, 2025
500-1000 runners
Kirkland, Washington
- Half Marathon, Trail & Road
October 19, 2025
100-500 runners
Pasco, Washington
- 10K, 5k, Half Marathon, Road
October 25, 2025
1-100 runners
Richland, Washington
- 10K, Half Marathon, Trail & Road
October 26, 2025
1-100 runners
Richland, Washington
- Half Marathon, Marathon, Road
October 26, 2025
100-500 runners
Washougal, Washington
- 10K, 5k, Half Marathon, Road
Running in Washington
FAQ
What are the most popular Washington half marathons?
The most popular Washington half marathons are the Seattle Half Marathon with 3,109 finishers in 2023. Followed by the Mount Rainier Half Marathon with 1,391 finishers in 2023.
What are the best Washington half marathons for beginners in 2025?
The Washington half marathons that we recommend most frequently for beginners are the:
Seattle Half Marathon: A large, well produced half marathon with a course around downtown Seattle and Green Lake.
Mount Rainier Half Marathon: A moderate course with 900 ft of elevation gain, with gorgeous views of Mt. Rainier, and a generous four hour time limit.
Iron Horse Half Marathon: A course along Olallie State Park finishing in North Bend with scenery of the river and woods with the entire thirteen miles downhill.
Which months can I run a half marathon in Washington?
Which Washington cities have half marathons?
You can run Washington half-marathon events in Anacortes, Ashford, Bainbridge Island, Bellingham, Bothell, Buckley, Burlington, Carnation, Chelan, Clarkston, Friday Harbor, Gig Harbor, Grand Coulee, Issaquah, Kennewick, Kent, Kirkland, Leavenworth, Long Beach, Maple Valley, North Bend, Ogden, Olympia, Port Angeles, Poulsbo, Puyallup, Quilcene, Redmond, Richland, Sammamish, Seattle, Sequim, Snohomish, Snoqualmie, Snoqualmie Pass, Spokane, Tacoma, Tieton, University Place, Vancouver, Walla Walla, Washougal, Wenatchee, White Salmon, and Zillah.
