I included the track that is east of the Kennedy and C&NW because the Bloomingdale Line used to connect with the line going east over the North Branch to serve many industries along the Chicago and Evanston Branch before gentrification caused most of the industries to disappear or give up using rail service.
Forgotten Chicago provides a history including the industries that were served by the route.
A Flickr Album of the trail
Chicago Switching has several photo collections covering this line.
Update: another description of the history.