It runs from U.S. Route 1 (US 1) to Schoodic Beach Road entirely within the town of Sullivan, Hancock County.

The route, known as Tunk Lake Road for its entire length, heads northeast through a mostly forested area with numerous houses lining the road.

It makes a turn to the east at an unpaved fire road but eventually curves back to the northeast.

It intersects Flanders Pond Road which provides access to the water body of the same name.

Before ending, SR 183 crosses the Down East Sunrise Trail, formerly a railroad line, within the community of Tunk Lake.