The Snohomish County Centennial Trail is a 30mi 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 on the former right-of-way of the Seattle, Lake Shore and Eastern Railway, comprises a 10ft non-motorized trail and a 6ft equestrian trail. The first segment of the corridor was opened in 1989, the centennial of the statehood of Washington, and the final segment between Arlington and the Skagit County line was opened in 2013.
