Washington · 10K
Lake Union 10K Run/Walk
Lake Union 10K Run/Walk is a 10K event held in Seattle, Washington. Its next confirmed date is Sunday, August 8, 2027. About 900 runners take part across all distances.
- Race day
- August 8, 2027
- Location
- Seattle, WA
- Field size
- ~900 runners
Race details
- Date
- Sunday, August 8, 2027
- 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
Registration, course & weather
- Registration status
- Registration status as last checked October 8, 2026: opens soon
- Start time
- 8:00 AM PDT
- Course profile
- Loop course; Road surface
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)
More 10Ks in Washington
Coming up next, by confirmed date.
More races in Seattle
More upcoming races in Washington
Keep exploring
- All races in Washington
- 5Ks in Washington 164 upcoming races
- 10Ks in Washington 101 upcoming races
- Half Marathons in Washington 54 upcoming races
- Marathons in Washington 26 upcoming races
- Running in Seattle 52 upcoming races
- 10Ks in the United States 2,755 upcoming races
- August races in Washington
- 10Ks in Oregon 32 upcoming races
- 10Ks in Idaho 18 upcoming races
- 10Ks in California 316 upcoming races
- 10Ks in Colorado 75 upcoming races
Guides from the RaceRove blog
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 8 min read How to Choose the Best Half Marathon for a PR, Racecation or 50-State Challenge The best half marathon depends on what you want from it. How to choose a course for a personal record, a race worth travelling for, or an efficient stop on a 50-state challenge.
- 4 min read Diplo's Run Club 2026-27: Every City, Date and Course Diplo's Run Club is a 5K with a post-race concert. Every US date for 2026-27 (San Francisco, New York, Los Angeles, San Diego and Phoenix), start times and courses.
- 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 confirmed date is Sunday, August 8, 2027.
- 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.
- Is registration open for the Lake Union 10K Run/Walk?
- Registration status as last checked October 8, 2026: opens soon.
- What time does the Lake Union 10K Run/Walk start?
- 8:00 AM PDT.
- What is the course like at the Lake Union 10K Run/Walk?
- Loop course; Road surface.
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.