C&M Subdivision

85.7 Milwaukee Intermodal Station west to Watertown Subdivision The Milwaukee Electric Menomonee River to Muskego Yard The Milwaukee Electric Kinnickinnic River Union Pacific Railroad Union Pacific Railroad 78.0 Milwaukee Airport Railroad Station 77.9 Lake 72.0 Oakwood 69.4 Caledonia 61.8 Sturtevant wye, to Union Pacific Railroad Hiawatha Connection Line to Trevor (proposed) 57.1 Somers 52.6 Truesdell Pleasant Prairie Wisconsin Illinois 46.5 Russell 42.9 Wadsworth 38.3 Gurnee MD-N to Fox Lake North Shore Line EJE/CN flyover (proposed) 32.3 Rondout (EJE/CN) 28.0 Lake Forest 24.2 Deerfield 22.9 Lake Cook Road 21.1 Northbrook 20.5 Tower A-20 UP Milwaukee Subdivision 18.8 Glen of North Glenview 17.4 Glenview 16.2 Golf 14.3 Morton Grove 11.6 Edgebrook 10.2 Forest Glen 9.0 UP Harvard Subdivision UP-NW 8.9 Mayfair 8.3 UP Cragin Lead 8.2 Grayland 6.4 Healy 5.4 Pacific Junction, Tower A-5 Elgin Subdivision MD-W NCS 2.9 Western Avenue 2.9 Tower A-2 UP Geneva Subdivision UP-W 0.0 Chicago Union Station BNSF Chicago Subdivision NS Chicago Line

The Chicago and Milwaukee Subdivision (commonly referred to as the C&M Subdivision or C&M Sub) is a railway line running between Chicago, Illinois and Milwaukee, Wisconsin. It is operated by Canadian Pacific Railway through its primary United States subsidiary, the Soo Line Railroad. This had previously been owned by the Chicago, Milwaukee, St. Paul and Pacific Railroad, commonly known as the Milwaukee Road. It carries Amtrak's Empire Builder and Hiawatha Service, as well as commuter trains operated on part of Metra's Milwaukee District/North Line into Chicago. The Union Pacific Railroad operates their Milwaukee Subdivision, a former Chicago and North Western line, parallel to this route just to the east.

This line once carried the Milwaukee Road's fast Hiawatha passenger trains, including trains that regularly exceeded 100 miles per hour (160 km/h). For several years in the 1940s and early 1950s, trains were scheduled to run along this stretch in 75 minutes or less. While stricter regulations eventually reduced the speed limit to 79 miles per hour (127 km/h) along this stretch, plans are in place as of 2010 to improve the line to support speeds up to 110 miles per hour (180 km/h)—modestly faster than historic trains that used the route.