You can run a half marathon in Washington in May, June, July, August, September, October, November, and December.
Washington Half Marathon Calendar
Browse all Washington Half Marathons in 2026 and 2027 by month and by City below. For each race, you’ll find the history of the half marathon and the course, the most recent year’s course maps, elevation profiles, runner reviews, pricing, and how to sign up.
We dedicated dozens of hours every month searching for races to include in the Washington Half Marathons calendar. If you happen to see any half marathon not included, contact us at info@halfmarathons.net to submit your race.
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 18, 2026
1,000-10,000 runners
Ashford, Washington
- Half Marathon, Trail & Road
Featured Race
May 16, 2026
1,000-10,000 runners
Ogden, Utah
- 5k, Half Marathon, Marathon, Road
Featured Race
May 17, 2026
1,000-10,000 runners
Spokane, Washington
- 10K, 5k, Half Marathon, Marathon, Trail
June 13, 2026
500-1000 runners
Snoqualmie Pass, Washington
- Half Marathon, Road
June 13, 2026
100-500 runners
White Salmon, Washington
- Half Marathon, Trail
June 14, 2026
1-100 runners
Olympia, Washington
- Half Marathon, Marathon, Road
June 20, 2026
1-100 runners
Dayton, Washington
- Half Marathon, Marathon, Trail
June 20, 2026
500-1000 runners
Carnation, Washington
- 10K, Half Marathon, Trail
June 20, 2026
1-100 runners
Issaquah, Washington
- 5k, Half Marathon, Trail, Ultramarathon
June 20, 2026
1-100 runners
Friday Harbor, Washington
- 10K, Half Marathon, Marathon, Road
June 27, 2026
100-500 runners
Seattle, Washington
- 10K, 5k, Half Marathon, Road
July 11, 2026
1-100 runners
Wenatchee, Washington
- Half Marathon, Trail, Ultramarathon
July 12, 2026
100-500 runners
Westport, Washington
- 10K, 5k, Half Marathon, Trail & Road
July 18, 2026
1,000-10,000 runners
Ashford, Washington
- Half Marathon, Trail & Road
July 18, 2026
100-500 runners
Olympia, Washington
- Half Marathon, Trail & Road
July 19, 2026
100-500 runners
Buckley, Washington
- 10K, Half Marathon, Road
July 26, 2026
500-1000 runners
Redmond, Washington
- 5k, Half Marathon, Trail
August 1, 2026
100-500 runners
Gig Harbor, Washington
- 10K, 5k, Half Marathon, Road
August 9, 2026
1-100 runners
North Bend, Washington
- Half Marathon, Marathon, Trail & Road
August 15, 2026
100-500 runners
University Place, Washington
- 10K, 5k, Half Marathon, Trail
August 29, 2026
100-500 runners
Tacoma, Washington
- 5k, Half Marathon, Trail & Road
August 29, 2026
100-500 runners
Mount St. Helens, Washington
- Half Marathon, Trail
August 29, 2026
1-100 runners
Seattle, Washington
- 10K, 5k, Half 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 2026?
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.
