SR 69 is signed east-west, but follows a northwest-to-southeast routing.

The highway proceeds southeast out of Pittsfield into the town of Detroit and meets SR 220 at the east branch of the Sebasticook River.

The two highways share a brief concurrency before splitting, with SR 69 continuing southeast towards Plymouth.

SR 69 has another interchange with I-95 at exit 174, located virtually on the town line.

Both routes terminate in the town center at US 1A, near the western bank of the Penobscot River.