Annual Summer Challenge
Dirty
Dozen.
Ride 12 designated trail systems across Washington and earn your spot on the finisher list.
What is it?
12 Trails. One Summer.
All Washington.
Each summer, Evergreen designates 12 trail systems across Washington as the Dirty Dozen challenge. Ride all 12, log your rides, and you're on the finisher list. Simple premise — the real reward is the trails you discover along the way.
The Dirty Dozen is about getting riders out to trails they've never visited, supporting chapters across the state, and building community around Washington's incredible riding network.
Trail Systems
Across all 10 chapters statewide
Summer
Runs June through October each year
Riders
Open to all Evergreen members
2026 Challenge
Details Coming Soon.
The 2026 Dirty Dozen trail list drops this summer. Check the blog for the announcement, and make sure you're a member to participate.