Washington · 10K
Lake Union 10K Run/Walk
Lake Union 10K Run/Walk is a 10K event held in Seattle, Washington. It was last held on August 9, 2026 and is usually run in August; the next date hasn't been announced yet. About 900 runners take part across all distances.
- Usually held
- August
- Location
- Seattle, WA
- Field size
- ~900 runners
Race details
- Last held
- August 9, 2026
- Usually held in
- August
- Location
- Seattle, Washington
- Distances
- 10K
- Field size
- About 900 runners
- Course
- Flat; clockwise loop around Lake Union on the Cheshiahud Loop Trail
- Registration
- runsignup.com
- Official website
- lakeunion10k.com
About the Lake Union 10K Run/Walk
A fast, flat 10K circling Lake Union on Seattle's Cheshiahud Loop Trail with views of the downtown skyline.
Rankings and notes
- Rankings and awards
- Established community 10K (17th annual in 2026)
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Guides from the RaceRove blog
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- Blog All guides Planning advice for finding, choosing and travelling to races.
Lake Union 10K Run/Walk: common questions
- When is the Lake Union 10K Run/Walk?
- The next date hasn't been announced in the listing yet. The race is usually held in August. Check the organiser's website for the official date.
- Where is the Lake Union 10K Run/Walk held?
- In Seattle, Washington.
- What distances does the Lake Union 10K Run/Walk offer?
- 10K.
- How many people run the Lake Union 10K Run/Walk?
- About 900 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Lake Union 10K Run/Walk?
- Registration is handled by the organiser at runsignup.com. Entry fees, caps and deadlines are set there.
Plan this race in RaceRove
Save it to your plan, compare it with other races, check typical race-day weather and track your 50-state progress in the interactive app.