High Quality Content by WIKIPEDIA articles! The Snoqualmie Tunnel is an abandoned railroad tunnel at Snoqualmie Pass at the border of King County and Kittitas County in Washington State. It is 2.3 miles (3.7 km) long. The tunnel now serves as part of a rail trail in Iron Horse State Park. The trail is called the John Wayne Pioneer Trail, but sometimes also called the Iron Horse Trail. It closed January 30, 2009 and reopened July 5, 2011 after renovations to the walls, ceiling, and path were completed.