Tenacious 10
Updated
Saturday, April 3, 2027, first start 8:00 AM, in Seattle (Gas Works Park). Distances: 10K, 10 miles. Entry from $64 to $74; the 10 miles goes from $74 to $79 after November 16.
- Date
- Saturday, April 3, 2027
- Start time
- 8:00 AM (earliest wave)
- Location
- Gas Works Park, Seattle, WA 98103
- Area
- Seattle (city), Seattle
- Distances
- 10K10 miles
- Course
- Road or path
- Price
- $64 to $74 plus the platform's processing fee
- Next price increase
- Monday, November 16, 2026: 10 miles $74 → $79
- Registration
- Open. Opened October 5, online signup closes Saturday, April 3, 2027
How to register
Registration is on RunSignup. Pick your distance, add any extras, and you'll get a confirmation email with your bib details. Sign up by November 16 to pay $74 instead of $79.
Register on RunSignup →Race website
Course and race notes
Spring has never felt this good. Join hundreds of runners for Seattle’s most iconic 10K and 10-mile loop around Lake Union. This isn’t just a run-it’s a celebration of everything that makes our city incredible. Start and finish at Gas Works Park. Cruise past Lake Union Park. Wave to the Space Needle.
From the race's own listing. Check the race website for the course map and parking.
Source: RunSignup public race API, refreshed 2026-10-17. Details can change; the registration page is the final word.