This linear park of over 1,600 acres celebrates its railroading history, spans several geological zones, protects several ecosystems and their inhabitants, and provides a variety of recreational pursuits. It is also home to Snoqualmie Pass Tunnel (seasonal) that is almost 2 miles long-bring your flashlight, and the Iron Horse Trail that is over 100 miles long following along the route of the railroad. Camping is allowed on a first come first served basis, and there are four primitive campgrounds along the trail, each with 3 to 4 sites, a picnic table and a vault toilet. There is also camping available by the trail near the U. S. Forest Service at Tinkham, Denny Creek, Lake Kachess, and Crystal Springs. There are no electric or water hookups at the campgrounds.