Vashon Island Ultramarathon & Trail Run
Vashon, United States • 6 Jun 2026
Vashon Island Ultramarathon & Trail Run
The event is a trail running weekend held on Vashon Island, Washington, using the Gateway Trail system near SW 178th and 103rd SW as the common start and finish. The course runs on single track and double track park trails with short sections of dirt road, gravel driveways, grass shoulders and paved road. Each loop has about 770 feet of elevation change and includes some steep short hills and sections with roots or downed logs.
Distances offered:
- 50K three loops of the course
- 20 Miler two loops of the course
- 10 Miler one loop of the course
Aid stations are located at roughly miles 6 and 10 and will include water, sports drink, electrolytes, fruit, sandwiches, gels and snacks. Porta-potties are available at 0, 0.5, 1.4 and 6 miles. A GPX map and detailed course description are emailed to entrants before the race because parts of the course cross private property. The course is not closed to the public; runners may encounter equestrians, pedestrians and bicyclists.
The event is produced by a volunteer non-profit organization that limits entries to 200 and supports youth athletics. The race is Trail Sister Approved, follows USATF Safe Sport requirements, and accommodates team scoring by adding three team members' finish times in male, female and mixed categories. Visit the organization's website for the most recent information.