Tenacious 10
Typically 41–54°F · some rain risk
See last 10 years
On this date: rain 3 of the last 10 years
2026
44–57°F
dry
2025
42–55°F
dry
2024
42–50°F
dry
2023
36–46°F
rain
2022
44–53°F
rain
2021
38–59°F
dry
2020
38–49°F
dry
2019
48–54°F
rain
2018
39–50°F
dry
2017
38–51°F
dry
Best months to race in Washington →
About this race
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. Conquer the Fremont Bridge.
Chase a PR, run with friends, or just soak it all in—this is one of Seattle’s most scenic and energizing race experiences.
⸻
Why You’ll Love It
• Flat, fast, and scenic Lake Union course
• Chip timing with mile splits and live tracking
• Printed finisher cards
• Long sleeve shirt + finisher medal
• FREE professional race photos
⸻
The Experience
Cross the finish line, grab your medal, and celebrate with your crew.
The pain fades. The photos last forever. The bragging rights? Those are eternal.
T10 WEBSITE
Course map
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