Metra is the primary user of the C&M Subdivision, with commuter services operating between Union Station and Fox Lake.

This service is supplemented by Amtrak, whose Empire Builder, Hiawatha and Borealis inter-city trains operate on the line between Union Station and Rondout, and also stop at Glenview.

This service is part of a pilot-program funded under a two-year, public-private partnership between Metra and Lake County Partners.

[6] Metra has included the possibility of extending the Milwaukee District North Line along one of two routes in their Cost Benefit Analysis report.

If this were to happen, the line could continue northwest via the Fox Lake branch to Richmond, with an additional stop in Spring Grove.

The mainline north of Rondout is owned by the CPKC[9] through its American subsidiary Soo Line Railroad and sees Amtrak and freight traffic only.

Commuter service beyond Fox Lake, abolished in 1982, served the communities of Spring Grove, Solon Mills, Zenda, and Walworth.