It runs from the intersection of Popham Road and Sea Street in the Phippsburg community of Popham Beach to an interchange with U.S. Route 1 (US 1) in Bath.

The entire route is in Sagadahoc County.

At its southern end, state maintenance of Popham Road continues past Sea Street to the entrance to Fort Popham.

[2] The entire route is in Sagadahoc County.

This Maine road or road transport-related article is a stub.