Tenacious 10
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Event details
The Tenacious 10 takes place on April 4, 2026, at Gas Works Park in Seattle, WA (2101 N Northlake Way, 98103). The event includes two distances: 10K and 10-mile. Entry prices listed on the event page are $63 for the 10K and $68 for the 10-mile, with a noted price increase after December 31, 2025. The event is USATF sanctioned. Packet pickup is scheduled for Friday, April 3rd, at Gas Works Park.
Course and logistics
Both courses start and finish within Gas Works Park and loop around Lake Union. The route passes Lake Union Park, the Space Needle, and the Fremont Bridge. Runners proceed down Eastlake until Fairview and will run on Westlake Ave. N. or on sidewalks, bike lanes, and trail depending on permit details. Organizers indicate roads will be closed for the event. Course maps are available via MapMyRun for each distance. Participants receive a zip-up hoody, a finisher medal, and free event photos. There is free parking at Gas Works Park; the event notes attendees should allow time to find a spot. A block of discounted hotel rooms is available at SpringHill Suites Seattle Downtown/South Lake Union if booked by March 5. Visit the organization's website for the most recent information.
