Vashon Island Ultramarathon & Trail Run
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Vashon Island Ultramarathon & Trail Run
The Vashon Island Ultramarathon & Trail Run is a trail running event on Vashon Island, WA, offering multiple loop races through the Gateway Trail system and Island Center Forest. Distances offered include:
- 50K three loops of the course
- 20 Miler two loops of the course
- 10 Miler one loop of the course
All races use the same start/finish at the Gateway Trail area near SW 178th and 103rd SW. The course includes primarily single track and double track park trails, with sections of dirt road, gravel driveways, grass shoulders and short paved road. Elevation change is about 770 feet per loop and the route includes short steep climbs, roots, downed logs and quick turns. Porta-potties are placed at approximately 0, 0.5, 1.4 and 6 miles.
Aid stations are located at miles 6 and 10; 50K runners pass each aid station three times. Aid station supplies include water, soda, carb fluids, salt, fruit, PBJs, gels, snacks and volunteers. Base camp returns occur roughly every ten miles and there is provision for drop bags, with an additional drop delivered to the Land Trust Aid Station at select miles.
The course runs on both public and private land and is not closed to the public; runners should expect other trail users such as equestrians, bicyclists and pedestrians. A course map and GPX file will be emailed to entrants in the week before the event. The event is USATF sanctioned, follows USATF rules and Safe Sport policies, limits the field to 200 participants, operates as a nonprofit, and has a no refund policy with entry transfers allowed until the organizer cut-off. Registration opens Dec 5, 2026. Camping on the Friday night before the event is available and the organizer requests campers confirm by email prior to arrival. Visit the organization's website for the most recent information.
