Washington · 10 Mile · 10K
Tenacious 10
Tenacious 10 is a 10 Mile and 10K event held in Seattle, Washington. Its next confirmed date is Saturday, April 3, 2027. About 1,500 runners take part across all distances.
- Race day
- April 3, 2027
- Location
- Seattle, WA
- Field size
- ~1,500 runners
Race details
- Date
- Saturday, April 3, 2027
- Location
- Seattle, Washington
- Distances
- 10 Mile, 10K
- Field size
- About 1,500 runners
- Course
- Flat (lake loop)
- Registration
- runsignup.com
- Official website
- tenaciousten.com
Registration, course & weather
- Registration status
- Registration status as last checked October 7, 2026: not announced
- Start time
- 8:00 AM PDT
- Course profile — 10 Mile
- Loop course; Road surface
- Course profile — 10K
- Loop course; Road surface
About the Tenacious 10
A popular spring road race looping around Lake Union from Gas Works Park, with 10-mile and 10K options and views of the Space Needle, Fremont Bridge, and Seattle skyline.
Rankings and notes
- Notes
- Scenic Lake Union loop with Seattle skyline views
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- Blog All guides Planning advice for finding, choosing and travelling to races.
Tenacious 10: common questions
- When is the Tenacious 10?
- The next confirmed date is Saturday, April 3, 2027.
- Where is the Tenacious 10 held?
- In Seattle, Washington.
- What distances does the Tenacious 10 offer?
- 10 Mile and 10K.
- How many people run the Tenacious 10?
- About 1,500 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 Tenacious 10?
- Registration is handled by the organiser at runsignup.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Tenacious 10?
- Registration status as last checked October 7, 2026: not announced.
- What time does the Tenacious 10 start?
- 8:00 AM PDT.
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.