Snohomish County Centennial Trail

The Snohomish County Centennial Trail is a 30-mile-long (48 km) rail trail in Snohomish County, Washington, connecting the cities of Snohomish, Lake Stevens, and Arlington to Skagit County along the corridor of Washington State Route 9. The trail, administered by Snohomish County Parks and Recreation, is on the former right-of-way of the Seattle, Lake Shore and Eastern Railway and comprises a 10-foot-wide (3.0 m) non-motorized trail and a 6-foot-wide (1.8 m) equestrian trail.

Source: Wikipedia — Snohomish County Centennial Trail (CC BY-SA 4.0)