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.
Connecticut Route 101
Route 101 starts at U.S. Route 44 as Mashamoquet Road then Killingly Road in the town of Pomfret. It runs along the Mashamoquet Brook State Park before intersecting with Route 169. It proceeds eastward, soon passing over the Quinebaug River into the town of Killingly. East of the river, the road becomes known as Hartford Pike. Route 101 then intersects Interstate 395 and Route 12, then passes near Chase Pond, a small pond related to the Chase Reservoir. Route 101 then passes between two large lakes; on the north, the Middle Reservoir (also known as the Chestnut Hill Reservoir), and on the south, the Bog Meadow Pond. It passes by more reservoirs, as it reaches its end at the Connecticut Rhode Island border. Route 101 continues in Rhode Island as Rhode Island Route 101.