Route 137 proceeds north along Meetinghouse Road, passing a residential strip before bending northeastward.

The route soon enters the community of East Harwich, crossing through some woods at the southern end.

At Old Queen Anne Road, Route 137 makes a sharp turn to the northwest and enters downtown East Harwich.

After Pleasant Bay Road, Route 137 enters a partial cloverleaf interchange (exit 85) with US 6 (Mid-Cape Highway).

After the interchange, Route 137 crosses between Cahoon and Mill ponds, continuing into the town of Brewster.