Its eastern terminus is at a five-way stop intersection on the Pennsylvania state line nearly 1.75 miles (2.82 km) south of Orangeville.

Picking up where SR 305 leaves off heading southeast into Pennsylvania from this intersection is PA 718.

There are no segments of SR 305 that are included as a part of the National Highway System (NHS).

The NHS is a network of highways identified as being most important for the economy, mobility and defense of the nation.

The highway was originally a very short route that existed only along its present easternmost stretch between its junction with SR 7 and its connection with PA 718 at the Pennsylvania state line.