The San Juan Island Marathon, Half Marathon, & 10k, is held in Friday Harbor, WA. It is held right after the Three Lakes Triathlon. Runners can expect a mix of terrain, including hills and flat stretches. The marathon and half marathon routes, in particular, provide great views of the Olympic and Cascade mountain ranges. The course is USATF-certified.
San Juan Island Marathon Half Marathon & 10K
June 14, 2025
Friday Harbor
Road
Ready to sign up?
1-100
Some Hills
High: 65°
/ Low: 50°
Visit the race website for an up to date course description.
Overview
The San Juan Island Marathon, Half Marathon, & 10k, is held in Friday Harbor, WA. It is held right after the Three Lakes Triathlon. Runners can expect a mix of terrain, including hills and flat stretches. The marathon and half marathon routes, in particular, provide great views of the Olympic and Cascade mountain ranges. The course is USATF-certified.
Course Description
Visit the race website for an up to date course description.
