You can run a half marathon in Washington in May, June, July, August, September, October, November, and December.
Washington Half Marathons in September
This is the calendar of all the Washington half marathons in September. 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 September 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 September, 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 September, 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
September 1, 2025
100-500 runners
Redmond, Washington
- Half Marathon, Trail
September 6, 2025
100-500 runners
Snoqualmie Pass, Washington
- Half Marathon, Trail
September 6, 2025
1-100 runners
Kennewick, Washington
- 10K, Half Marathon, Marathon, Trail & Road
September 6, 2025
100-500 runners
Vancouver, Washington
- Half Marathon, Marathon, Road
September 6, 2025
100-500 runners
Port Angeles, Washington
- Half Marathon, Marathon, Trail & Road, Ultramarathon
September 6, 2025
500-1000 runners
Carnation, Washington
- 10K, 5k, Half Marathon, Marathon, Trail
September 7, 2025
1-100 runners
Gig Harbor, Washington
- 5k, Half Marathon, Road
September 14, 2025
1-100 runners
Burlington, Washington
- Half Marathon, Marathon, Road
September 20, 2025
1,000-10,000 runners
Seattle, Washington
- Half Marathon, Trail & Road
September 20, 2025
1-100 runners
Grand Coulee, Washington
- 10K, 5k, Half Marathon, Road
September 20, 2025
100-500 runners
Anacortes, Washington
- 5k, Half Marathon, Trail & Road
September 20, 2025
100-500 runners
Buckley, Washington
- 5k, Half Marathon, Marathon, Trail & Road
September 21, 2025
500-1000 runners
Bellingham, Washington
- 10K, 5k, Half Marathon, Marathon, Trail & Road
September 21, 2025
1-100 runners
Quilcene, Washington
- 10K, Half Marathon, Road
September 22, 2025
1-100 runners
Clarkston, Washington
- 10K, 5k, Half Marathon, Marathon, Trail & Road
September 27, 2025
1-100 runners
Puyallup, Washington
- 10K, Half Marathon, Road
September 27, 2025
1-100 runners
Colbert, Washington
- Half Marathon, Road
September 27, 2025
100-500 runners
Anacortes, Washington
- Half Marathon, Marathon, Trail & 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.
