Tenacious 10
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Event overview
The Tenacious 10 takes place on April 4, 2026 in Seattle, Washington, with the venue listed as Gas Works Park (2101 N Northlake Way, Seattle, WA 98103). The event offers two distances:
- 10 miles
- 10K
This USATF-sanctioned event includes packet pickup at Gas Works Park on Friday, April 3 (time TBD). Registrations have early-bird pricing through October 31, 2025: the 10-mile event is listed at $59 and the 10K at $54. Participants receive a zip-up hoody, a finisher medal, and complimentary finish-line photos.
Course and logistics
Both races start and finish within Gas Works Park and loop around Lake Union, passing Lake Union Park, the Space Needle, and the Fremont Bridge. The route directs runners down Eastlake to Fairview and uses Westlake Ave. N., sidewalks, bike lanes, and trail segments depending on permitting. Roads will be closed for the event to support the course. Free parking is available at Gas Works Park. A block of discounted hotel rooms is available at SpringHill Suites Seattle Downtown/South Lake Union; reservations must be made by March 5. Maps for each route are provided by the organizers. Visit the organization's website for the most recent information.