Vashon Island Ultramarathon & Trail Run

JUN
6
2026
Trail races on Vashon Island offering 50K, 20 mile and 10 mile courses through the Gateway Trail system with aid stations, team competition, youth discounts and volunteer nonprofit organization.
Sat 6 Jun 2026
50 kilometers 20 miles 10 miles

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Vashon Island Ultramarathon & Trail Run

The Vashon Island Ultramarathon & Trail Run is a volunteer-run, nonprofit trail event on Vashon Island, Washington, in its 16th year. The event limits entries to 200 and directs proceeds to support island youth athletics. The organizer operates under ATRA event standards and holds a USATF sanction with compliance to Safe Sport policies.

Distances

  • 50K
  • 20 Miler
  • 10 Miler

All races use the Gateway Trail system near SW 178th and 103rd SW and follow marked loops that pass through park interior and perimeter trails, private property, and some paved sections. The course surface is primarily single track and double track with some dirt roads, gravel driveways, grass shoulders and short paved sections. Elevation change is about 770 feet per loop and includes short steep hills and sections with roots, downed logs, quick turns and sharp changes in elevation.

Aid stations are located at approximately miles 6 and 10; 50K participants will visit each station three times. Porta potties are placed at 0, 0.5, 1.4 and 6 miles. Base camp recurs about every ten miles and accommodates drop bags. Food, beverages and basic supplies are provided at aid stations. The course is not closed to the public; runners should expect equestrians, pedestrians and bicyclists and yield to motorized traffic on roads.

The event introduces team competition for three-member teams in female, male and mixed categories, with a team captain responsible for aggregating and reporting finish times. Camping on Friday night is available in the start/finish field with porta-potties and water in jugs. There are no refunds; roll-overs may be allowed for reasons outside a runner's control. Live tracking is available through UltraSignup. Visit the organization's website for the most recent information.

50 km
50k
20 mi
20 Miler
10 mi
10 Miler
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