State Route 7 (SR 7) is a state highway in Lewis and Pierce counties, located in the U.S. state of Washington. The long roadway begins at U.S. Route 12 (US 12) in Morton and continues north to intersect several other state highways to Tacoma, where it ends at an interchange with Interstate 5 (I-5) and I-705. The road has several names, such as Second Street in Morton, the Mountain Highway in rural areas, Pacific Avenue in Spanaway, Parkland and Tacoma and 38th Street in Tacoma. Near the end of the highway there is a short freeway that has been proposed to be extended south parallel to an already existing railroad, owned by Tacoma Rail, which serves as the median of the short freeway. The earliest road to use the current route of SR 7 first appeared in a 1900 map of the Tacoma area and has been part of the state highway system since 1909, when the Alder-Kosmos Road was added to the system as State Road 18. State Road 18 became part of two branches of State Road 5 in 1923 and later branches of Primary State Highway 5. During the 1964 highway renumbering, the branches became SR 7. Route description SR 7 begins at an intersection with U.S. Route 12 (US 12), a major east–west highway, in Morton. Traveling north as Second Street and paralleling the Morton–Tacoma (Mountain Division) route of Tacoma Rail, the street intersects Main Avenue, which continues west out of the city as SR 508. After leaving Morton, the highway becomes the Mountain Highway and passes through a heavily forested canyon near Mount Rainier and parallel to the Tilton River and Roundrop Creek. Bridging the Nisqually River, the highway leaves Lewis County and enters Pierce County. In Elbe, the roadway intersects SR 706, which goes east to Mount Rainier National Park. Following the Nisqually River, which has become *Alder Lake, and Tacoma Rail line, SR 161 branches off towards Eatonville and SR 702 travels west from the plains to McKenna. Passing Elk Plain and suburban areas, the highway enters Spanaway near the Fort Lewis boundary where SR 7 intersects SR 507, which continues southwest to Chehalis. The Mountain Highway becomes Pacific Avenue and enters Parkland. Shortly after 112th Street, the roadway has a partial cloverleaf interchange with SR 512, which uses 108th Street South as two ramps. Leaving Parkland and entering Tacoma, Pacific Avenue turns