San Juan Island Marathon, Half Marathon & 10K

Saturday, June 14, 2025 • Friday Harbor, WA • Course Map

Washington state’s San Juan Islands draw travelers by the thousands each year to view the islands’ beautiful seashores, nature trails and wildlife (including killer whales), and welcomes runners back for the annual San Juan Island Marathon, Half Marathon and 10K races.

The course for the half marathon, a hilly race (especially in the route’s first six miles) that features changes in elevation from 25 feet to over 250 feet above sea level, starts and finishes at Lakedale Resort overlooking Neva Lake and Dream Lake.

From there, the race follows a clockwise loop around the island, unfolding along Roche Harbor Road, Beaverton Valley Road, West Valley Road and then again on Roche Harbor Road before turning in to Lakedale Resort again to cross the race finish line.

The course ventures out largely along city streets, twisting and turning through town onto country roads for the latter part of the race.

In the half marathon course’s somewhat less-hilly second half, runners are treated to scenic views of the island’s farmland, lakes and forests, and then return back to the fairgrounds for the finish. For participants in the half marathon (which is open to both runners and walkers), the race begins at 9:00 AM.

Race Weather & Climate

Tucked into the corner of the state just south of the Canadian city of Vancouver, the San Juan Islands experience generally cool to mild weather in the summer, as average monthly temperatures in Friday Harbor range between 67°F and 48°F in June, with just under 1.3 inches of rainfall for the month.

June 14 average low temp: 50°F
June 14 average high temp: 65°F

Past Results

Course Map

See the race route map for the San Juan Island Half Marathon here.

Starting Time

7:30 AM – full marathon
9:00 AM – half marathon
9:10 AM – 10K

Fees

$85 and up – half marathon
$90 and up – full marathon
$60 and up – 10K

Registration

To reserve your spot in the 2025 running of Friday Harbor’s San Juan Island Marathon, Half Marathon or 10K race, register online at RunSignUp.com here.

Official Race Website

www.lakedale.com

Comments

Ever run in the San Juan Island Half Marathon? Share your impressions here, or post your review in the Comments below.

See more races in: June, Washington

1 comment… add one

Kara Bezanson April 12, 2017, 1:12 pm

Good morning!

My name is Kara Bezanson and I teach at beautiful Bellingham High School. I have the fun and privilege of teaching a class there called “Walking for Fitness” where we teach students that walking — particularity distance walking is a valid pathway to getting and remaining fit. I love this class because I myself (speed) walk half marathons myself as a major part of my fitness plan. In fact, the San Juan Island Half was my first way back in 2014! 🙂

I am writing because I have had a few students let me know that they would like to satisfy their final test requirement by taking part in your half marathon in June — yours gives them the most time to train. I have often had success encouraging students to try this new challenge by checking in with race organizers to see if there is a chance for the students to get a discount? Please let me know if this is a possibility for your race.

Thank you for considering!!! 🙂
Kara Bezanson
Bellingham High PE

Reply