That land underneath the C&E North Line from Kingsbury north to Wrightwood was retained by the corporate successor to the Milwaukee Road, the Chicago Milwaukee Corporation (CMC), when it sold the railroad operations to the Soo Line in 1985. The Soo Line operated up to Peerless and back using trackage rights on the land owned by CMC.
CMC only existed to liquidate and/or develop the former Milwaukee Road's once vast real estate holdings including timber lands out west and pay it out as dividends. The stub of the C&E North Line kept alive by Peerless Confectionery stymied CMC's attempts to sell the land for decades. CMC eventually became CMC Heartland Partners, then just Heartland Partners. One of its last projects was the sale of the land in the West Loop area that was once a Milwaukee Road yard where today high-rise condos and stores sit.
It finally liquidated in 2007 and the remaining properties were sold off. In Heartland Partners' final SEC filing it was unclear which of several possible buyers acquired the land underneath the tracks on the C&E North Line. So the C&E North Line outlasted CMC/Heartland-barely.