U.S. Route 101
The nearly highway's northern terminus is in Tumwater, Washington: the route remains along the Olympic Peninsula's coastal perimeter west, north, and east; the northernmost point on the highway is in Port Angeles. The southern terminus of US 101 is in Los Angeles at the East Los Angeles Interchange, the world's busiest freeway interchange.
South Dakota Highway 101
Highway 101 begins at a junction with Highway 22. The road travels north paralleling the Minnesota state line, entering the town of Gary, South Dakota as Herrick Street. Highway 101 ends at Main Avenue in Gary.