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 on TrailForks, and earn 1 year of TrailForks Pro — free.
For 2026, the challenge is split into two Six Packs — East and West — each with their own TrailForks badge. Earn either Six Pack badge, or go for the full Dirty Dozen and unlock all three.
Trail Systems
Across all 10 chapters statewide
Badges to Earn
East Six Pack · West Six Pack · Dirty Dozen
TrailForks Pro
Complete all 12 and earn it free
Six Pack #1
East Six Pack
Six trails across Eastern Washington and the Cascades — from Liberty Lake to Roslyn. Diverse riding, big country.
This XC trail in the Liberty Lake area was recently completed by the Evergreen East Chapter, and is just as fun climbing as it is descending. It features a steady mix of twists and turns with smooth, well-shaped corners that keep the ride flowing. The layout strikes a nice balance between effort and reward, making it an enjoyable and playful experience in both directions.
1.8 miles · Blue ■ / Intermediate · East Chapter · Liberty Lake, WA
High alpine XC ride in the Kettle Crest area near Republic, WA. Panoramic views and wildflower meadows reward the effort. Ride clockwise for the best experience — there's an optional 2-mile extension to the Snow Peak Cabin for those wanting more.
~4 miles · Blue ■ / Intermediate · East Chapter · Kettle Crest, Republic, WA
A new trail at Loup Loup built by the Methow Chapter with three distinct sections: rocky slabs up top, a flowy ski-hillside middle, and a loamy lower section through the trees. Features gap jumps and berms throughout.
1.7 miles · Black / Advanced · Methow Chapter · Loup Loup
A ridgeline trail at Number 2 Canyon near Wenatchee with sweeping views of the Enchantments. Fast and smooth, following the natural contours of the terrain — one of the best trails in Central Washington.
3.3 miles · Blue ■ / Intermediate · Central Chapter · Number 2 Canyon, Wenatchee
The only black-rated trail at Squilchuck State Park near Wenatchee. Features skinnies, tight switchbacks, rock gardens, and a scree-field traverse. Rideable in both directions for completely different experiences.
1.3 miles · Black Diamond · Central Chapter · Squilchuck State Park, Wenatchee
A Roslyn classic — accessed via Ewok and Paul's Trail. Flowy with technical features throughout. Extend the ride through Middle and Lower Beer Can, or connect to Grotto and Slickrock for a longer day.
1.5 miles · Blue ■ / Intermediate · Kittitas Chapter · Roslyn, WA
Six Pack #2
West Six Pack
Six trails across Western Washington — from Chuckanut to Cheasty, Bremerton to Randle. Big descents, PNW classics.
A fast ~3,000 vertical foot descent through open meadows and into forest near Randle, WA. Views of Rainier, Adams, St. Helens, Hood, and the Goat Rocks along the way. Shared with motorized traffic — worth every pedal stroke.
5.9 miles · Black / Advanced · Cowlitz-Naches Chapter · Randle, WA
A short, directional bike-only trail in Lacamas Park near Camas. Jumps, twists, turns, and technical elements packed into a tight loop — easy to lap and hard to leave.
0.6 miles · Blue ■ / Intermediate · Southwest Chapter · Lacamas Park, Camas, WA
An adventure trail through Greenwater forests with a spectacular Mt. Rainier view right from the start. Can be shuttled for a pure descent or ridden as a loop by linking up with Skookum Flats.
8 miles · Blue ■ / Intermediate · South Sound Chapter · Greenwater, WA
The first forested urban MTB trail in Seattle, built by Evergreen in partnership with Seattle Parks and Recreation. Part of the Cheasty Mountain Bike/Pedestrian Trail Pilot Project — opened October 2025 and already a neighborhood classic.
0.6 miles · Blue ■ / Intermediate · Cascades to Sound Chapter · Cheasty Greenspace, Seattle
A backcountry-feeling descent in Green Mountain State Forest near Bremerton — technical, long, and rewarding with Olympic Mountain views at the top. Multi-use trail; watch for hikers on the way down.
2.2 miles · Black / Advanced · West Sound Chapter · Green Mountain State Forest, Bremerton
A twisty, technical trail in the Chuckanut Mountains near Bellingham with "a great bouncy rhythm and loads of cheap thrills." This is a guest feature from our friends at Whatcom Mountain Bike Coalition. Shuttle or e-bike access recommended.
0.8 miles · Black / Advanced · Whatcom Mountain Bike Coalition · Chuckanut Mountain, Bellingham
How to Participate
Log your rides.
Earn your badge.
The easiest way to track your Dirty Dozen progress is through TrailForks. Ride a trail, log it on TrailForks, and the badge system tracks your progress automatically.
Complete all 12 trails and TrailForks awards you 1 year of TrailForks Pro — free. You'll also earn individual badges for the East Six Pack and West Six Pack.
Three Badges to Unlock
After the Ride
Post-Ride Spots.
Ready to ride?
Start logging.
The 2026 Dirty Dozen is live. Ride all 12, earn TrailForks Pro. Make sure you're a member to participate.