Washington, United States
North Cascades Highway (SR-20)
Most dramatic mountain highway in Washington State.
Sedro-Woolley → Winthrop
- Distance
- 128 mi
- Level
- Medium
- Type
- Pass
- Season
- June - October
Highlights
- Diablo Lake
- Washington Pass
- Rainy Pass
Must ride
★ 9.0/ 10
Risks
Changeable weatherLow temperatures off-seasonTrafficFatigue on long ridesWildlifeSummer heat
Fuel stops
Sedro-WoolleyWinthrop
Food stops
Diablo Lake

Ride it with RideCall
Find this route in the app, invite your group and track the ride.
More routes in Washington
All routes in Washington →Chinook Pass Scenic Byway
Mount Rainier views and Tipsoo Lake at 5,430 feet.
97 mi · Medium · Enumclaw → Naches
Olympic Peninsula Loop
Rainforest, Pacific coast, and Strait of Juan de Fuca.
177 mi · Medium · Port Angeles → Hood Canal
Mount Rainier Loop
Circumnavigate Washington's iconic 14,411-foot volcano.
125 mi · Medium · Enumclaw → Sunrise
Columbia River Gorge (Washington)
Washington side of the Gorge with Maryhill Museum.
117 mi · Medium · Vancouver → Goldendale
Stevens Pass Greenway
Cascade cross-state route through mountain passes.
100 mi · Medium · Everett → Leavenworth
Whidbey Island Scenic Isleway
Puget Sound island with Deception Pass bridge.
39 mi · Easy · Clinton → Oak Harbor