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 2025 and 2026 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 dedicate 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 [email protected] 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
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
Featured Race
March 15, 2026
1,000-10,000 runners
Spokane, Washington
- 10K, 5k, Half Marathon, Road
Featured Race
April 12, 2026
500-1000 runners
Spokane, Washington
- 10K, 5k, Half Marathon, Trail
January 17, 2026
1-100 runners
Seattle, Washington
- 10K, 5k, Half Marathon, Road
January 31, 2026
1-100 runners
Tukwila, Washington
- Half Marathon, Marathon, Trail & Road
February 7, 2026
1-100 runners
Tukwila, Washington
- Half Marathon, Road
February 8, 2026
100-500 runners
Seattle, Washington
- 10K, 5k, Half Marathon, Road
February 14, 2026
1-100 runners
Sedro Woolley, Washington
- Half Marathon, Marathon, Road, Ultramarathon
February 14, 2026
500-1000 runners
Coupeville, Washington
- Half Marathon, Marathon, Trail
February 14, 2026
100-500 runners
Olympia, Washington
- 10K, Half Marathon, Road
February 22, 2026
100-500 runners
Vancouver, Washington
- Half Marathon, Trail & Road
February 28, 2026
100-500 runners
Richland, Washington
- 10K, 5k, Half Marathon, Road
March 7, 2026
1-100 runners
Lakewood, Washington
- 10K, 5k, Half Marathon, Road
March 7, 2026
100-500 runners
Pullman, Washington
- Half Marathon, Road
March 7, 2026
1,000-10,000 runners
Redmond, Washington
- Half Marathon, Trail
March 8, 2026
500-1000 runners
Kirkland, Washington
- Half Marathon, Trail & Road
March 14, 2026
100-500 runners
Kent, Washington
- 10K, Half Marathon, Trail
March 15, 2026
1,000-10,000 runners
Spokane, Washington
- 10K, 5k, Half Marathon, Road
March 21, 2026
100-500 runners
Federal Way, Washington
- 10K, Half Marathon, Trail
March 21, 2026
1-100 runners
Everson, Washington
- Half Marathon, Road
March 28, 2026
1,000-10,000 runners
Seattle, Washington
- 10K, Half Marathon, Marathon, Road
March 28, 2026
100-500 runners
Yakima, Washington
- Half Marathon, 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.
