King County, Washington, United States
25.2 miles (40.5 km) · 8,244 ft elevation gain · Point to Point · trail · Route
The I-90 Corridor "Backside" (WA) is a 25.2 mile route in King County, Washington, United States. The course features 8,251 feet of elevation gain and 6,005 feet of descent. The most significant ascent covers 8.9 miles and gains 4,232 feet. Vertical rate measures 329 feet of gain per mile. Approximately 38% of the route is runnable. The route follows trail surfaces. Technical difficulty: mountainous. This route ranks at the 87.68th percentile for difficulty among similar distances. This point-to-point route attracts trail runners and hikers exploring Washington's mountain terrain.
Preview this trail in 3D flyover, view the elevation profile, and explore the segment breakdown.
View Full Route Details →