Ready to race? Register directly on the official race website — opens in a new tab.
Register →Save this race to your wishlist, set a registration reminder, and build a full training plan on Trehko.
Waldo 100K is a 100k trail running event held in Oakridge, OR on Aug 1, 2026. It draws 300 competitors. The course has a hilly profile.
Trehko tracks registration status, entry fees, and deadlines for Waldo 100K and thousands of other endurance races. Use the app to set a registration reminder and build a training plan tailored to race day.
Browse by discipline: