The M&N reached Green Bay, Wis., in 1873, where their first train arrived on 19 June. In 1874, they constructed a bridge to cross the Fox River in order to extend their tracks from Green Bay into Fort Howard, Wis. In 1881, they laid 24.4 miles of track from Fort Howard to a point 1 mile south of Stiles, Wis. They constructed 15.1 miles of their main line from a point 1 mile south of Stiles, Wis., to Coleman, Wis., in 1882. In 1883, their line was extended from Coleman to Wausaukee, Wis., a distance of 22.2 miles. In 1884, 9.8 miles of track were laid from Wausaukee to Pike, Wis. (now Amberg, Wis.). The line was extended 20.12 miles from Pike to Station 4852, on the Menominee River (the border of Wisconsin and Michigan), in 1886. This portion of the former M&N main line is operated by the Escanaba & Lake Superior (E&LS or ELS).