[3] The road heads northeast passing to the south of Rumford Mill before making a curve to the southeast closely following the southern banks of the Androscoggin River.

Near Gilbertville, the highway breaks off of its close following of the river and heads south into Canton where it intersects State Route 140 in the town center.

It briefly clips the town of Hartford before entering Livermore, Androscoggin County.

SR 108 carries the name Canton Road as it heads towards the town center.

Canton Road continues south as a state-maintained highway signed as SR 108 but not officially designated as such by the Maine Department of Transportation.