US 2 leaves the Ottawa National Forest at Iron River , and the highway continues eastward through forest lands near several small lakes to Crystal Falls , the county seat of Iron County . On the west side of town , US 2 meets US 141 ; the two highways run concurrently along Crystal Avenue . The combined highway turns south onto 5th Street and meets M ‑ 69 's eastern terminus at the intersection between 5th Street and Superior Avenue next to the county courthouse at the top of the hill . US 2 / US 141 runs south out of Crystal Falls to the west of , and parallel to , the Paint River . The roadway passes Railroad , Kennedy and Stager lakes and leaves the state of Michigan at the Brule River , crossing into Florence County , Wisconsin for about 14 miles ( 23 km ) .