Centennial100 Ultra

The Centennial100 Relay and Ultra is a 100-kilometer (62 miles) running event held on the Centennial Trail, starting at Space 802 in Snohomish, Washington. Scheduled for August 16, 2025, it welcomes solo runners or teams of 2, 3, or 6 participants. The course features themed exchange points, each offering a mini running party atmosphere.

Participants receive finisher medals and stickers, with race swag promised to be exceptional for the inaugural year. The event concludes with an after-party at Space 802, including live music, a beer garden, and BBQ, creating a festive and community-focused running experience. Visit the organization's website for the most recent information.