Vashon Island Ultramarathon & Trail Run
Vashon, United States • 6 Jun 2026
Vashon Island Ultramarathon & Trail Run : event overview
The event offers multiple trail distances departing from the Gateway Trail system near SW 178th and 103rd SW on Vashon Island. Distances available:
- 50K
- 20 Miler
- 10 Miler
All races share the same start and finish area and loop through Island Center Forest and nearby preserves. The course uses single track and double track park trails, with sections of dirt road, gravel driveways, grass shoulders and short paved segments. Elevation change is about 770 feet per loop and the route includes short steep climbs and technical footing in places (roots, downed logs, quick turns).
Aid stations are located at approximately miles 6 and 10; 50K runners visit each aid station three times. Stations provide water, sports drinks, electrolyte supplements, fruit, sandwiches, gels, snacks and a place for drop bags. Porta potties are located near 0, 0.5, 1.4 and 6 miles. The course passes on both public and private land and is not closed to other users; runners may encounter equestrians, pedestrians and bicyclists.
The event is USATF sanctioned and adheres to ATRA event standards. It limits entries to 200 to reduce environmental impact. The race is organized as a nonprofit effort that supports local youth athletics. A youth certification program and team competition categories are included. Visit the organization's website for the most recent information.