Iron Horse State Park, part of the Washington State Park System, is a 1,612-acre (7 km2) state park located in the Cascade Mountains and Yakima River Valley, between Cedar Falls on the west and the Columbia River on the east. At Cedar Falls, the west end of Iron Horse State Park, the Palouse to Cascades State Park Trail connects to the Snoqualmie Valley Trail of the King County Regional Trail System. The Snoqualmie Valley Trail is built on a portion of the former Milwaukee Road branch line from Cedar Falls to Everett.