Centennial100 Ultra
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2026 Centennial100 Relay and Ultra
The Centennial 100 Relay and Ultra Run is a 100 km (62 miles) event on Saturday, June 13, 2026. The event starts at Space 802, 802 1st Street, Snohomish, WA, and follows the Centennial Trail. The course can be completed by teams of six, three, two, or by solo runners. Race swag includes a version of a mesh football jersey. An after party at Space 802 will run until the last finisher and will include music, a beer garden and food.
Course, exchanges and entry options
The route is divided into six exchange legs along the Centennial Trail. Per-runner total distances are listed below:
- Runner 1 - 9.83 miles
- Runner 2 - 9.61 miles
- Runner 3 - 11.56 miles
- Runner 4 - 11.56 miles
- Runner 5 - 9.61 miles
- Runner 6 - 9.83 miles
Cowbell distribution by entry type: teams of six receive 2 cowbells per finisher; teams of three receive 3; teams of two receive 4; solo participants receive 7. Registration options include free registration for relay team members, paid registration for relay captains and solo entrants. Published fees vary by team size and registration period (examples: six-person captain fees shown as $325.09 and $389.67; three-person captain fees shown as $163.64 and $195.93; two-person captain fees shown as $109.81 and $131.34; solo shown as $109.81 and $131.34). Event contact is Snohomish Running Company. Visit the organization's website for the most recent information.