September is the most popular month to run a half marathon in Washington.
Washington Half Marathon Calendar
Browse all Washington Half Marathons in 2025 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 [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
November 9, 2025
100-500 runners
University Place, Washington
- 10K, 5k, Half Marathon, Trail
Featured Race
March 16, 2025
1,000-10,000 runners
Spokane, Featured
- 10K, 5k, Half Marathon, Road
Featured Race
April 13, 2025
500-1000 runners
Spokane, Featured
- 10K, 5k, Half Marathon, Trail
February 9, 2025
100-500 runners
Seattle, Washington
- 10K, 5k, Half Marathon, Road
February 15, 2025
1-100 runners
Sedro-Woolley, Washington
- Half Marathon, Marathon, Road, Ultramarathon
February 22, 2025
100-500 runners
Richland, Washington
- 10K, 5k, Half Marathon, Road
March 1, 2025
1-100 runners
Lakewood, Washington
- 10K, 5k, Half Marathon, Road
March 8, 2025
1,000-10,000 runners
Redmond, Washington
- Half Marathon, Trail
March 15, 2025
100-500 runners
Kent, Washington
- 10K, Half Marathon, Trail
March 16, 2025
1,000-10,000 runners
Spokane, Featured
- 10K, 5k, Half Marathon, Road
March 22, 2025
1-100 runners
Everson, Washington
- Half Marathon, Road
April 12, 2025
100-500 runners
Port Angeles, Washington
- Half Marathon, Trail, Ultramarathon
April 13, 2025
100-500 runners
Everett, Washington
- 10K, Half Marathon, Marathon, Road
April 13, 2025
500-1000 runners
Spokane, Featured
- 10K, 5k, Half Marathon, Trail
April 19, 2025
1-100 runners
Seattle, Washington
- 10K, 5k, Half Marathon, Trail & Road
April 19, 2025
100-500 runners
Wenatchee, Washington
- 10K, 5k, Half Marathon, Marathon, Trail
April 19, 2025
1-100 runners
Kennewick, Washington
- 5k, Half Marathon, Marathon, Road
April 20, 2025
100-500 runners
Vancouver, Washington
- 10K, 5k, Half Marathon, Road
April 26, 2025
100-500 runners
Winthrop, Washington
- Half Marathon, Marathon, Trail & Road
April 27, 2025
500-1000 runners
Oak Harbor, Washington
- 10K, 5k, Half Marathon, Marathon, Road
May 3, 2025
1-100 runners
Tieton, Washington
- 10K, Half Marathon, Road
May 4, 2025
1-100 runners
Kirkland, Washington
- 5k, Half Marathon, Trail & Road
May 4, 2025
1-100 runners
Long Beach, 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 2024?
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.
What’s the best month to run a half marathon in Washington?
What are the most popular cities to run Washington half marathons?
Seattle is the most popular city to host Washington half marathons.
