The shape of the route is an unusual U-shape and travels along the peninsula surrounded by Blue Hill Bay, Eggemoggin Reach, and Bagaduce River.

The transition point of the directional signage occurs about 2+1⁄2 miles (4.0 km) from the Blue Hill terminus.

SR 175 begins to curve to the north to follow the short Benjamin River.

It executes a pair of sharp bends to the south at High Street and continues west past some houses.

It crosses the river, re-enters Sedgwick, and comes to a T-intersection at Southern Bay Road.

The road continues northwest into the center of Penobscot where it passes a church and additional houses.

The road curves around the north side of the bay and its coves before SR 175 breaks away from the concurrency after two miles (3.2 km).

On all other portions, the road is part of the State Aid System and is maintained by MaineDOT during the summer and by its respective town during the winter.