You can run a half marathon in Washington in May, June, July, August, September, October, November, and December.
Upcoming Half Marathons Near Seattle, WA
Looking for a half marathon in Seattle, Washington? Browse the most comprehensive Seattle half marathon calendar with each race history, course description, difficulty rating, finisher ranges, scenery, and what the race is perfect for like family-friendly or lots of crowd support.
You’ll also be able to find must-know race logistics like pricing, start time, and course maps.
Half marathons are always coming and going. If you don’t see a race on the Seattle half marathon calendar, you can contact us at [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
Featured Race
May 18, 2025
1,000-10,000 runners
Spokane, Washington
- 10K, 5k, Half Marathon, Marathon, Trail
Featured Race
May 17, 2025
1,000-10,000 runners
Ogden, Arizona
- 5k, Half Marathon, Marathon, Road
May 31, 2025
100-500 runners
Sammamish, Washington
- 10K, 5k, Half Marathon, Trail
June 7, 2025
1-100 runners
Maple Valley, Washington
- Half Marathon, Trail
June 7, 2025
1-100 runners
Kent, Washington
- Half Marathon, Marathon, Relay, Trail & Road
June 8, 2025
500-1000 runners
Bainbridge Island, Washington
- Half Marathon, Trail & Road
June 21, 2025
100-500 runners
Seattle, Washington
- 10K, 5k, Half Marathon, Road
June 21, 2025
1-100 runners
Issaquah, Washington
- 5k, Half Marathon, Trail, Ultramarathon
June 21, 2025
500-1000 runners
Carnation, Washington
- 10K, Half Marathon, Trail
June 28, 2025
1-100 runners
Issaquah, Washington
- 5k, Half Marathon, Trail, Ultramarathon
July 5, 2025
1-100 runners
Bothell, Washington
- Half Marathon, Marathon, Trail & Road, Ultramarathon
July 6, 2025
1-100 runners
Seattle, Washington
- Half Marathon, Marathon, Road, Ultramarathon
July 27, 2025
500-1000 runners
Redmond, Washington
- 5k, Half Marathon, Trail
August 2, 2025
100-500 runners
Gig Harbor, Washington
- 10K, 5k, Half Marathon, Road
August 23, 2025
100-500 runners
Tacoma, Washington
- 5k, Half Marathon, Trail & Road
August 30, 2025
1-100 runners
Seattle, Washington
- 10K, 5k, Half Marathon, Trail & Road
September 1, 2025
100-500 runners
Redmond, Washington
- Half Marathon, Trail
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 20, 2025
1,000-10,000 runners
Seattle, Washington
- Half Marathon, Trail & Road
October 5, 2025
100-500 runners
Poulsbo, Washington
- 10K, Half Marathon, Road
October 12, 2025
500-1000 runners
Snohomish, 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.
