On June 14, 1959, the B&M introduced a series of service cutbacks, including the abandonment of the north half of the Woburn Loop.

Salem Street was closed on June 30, 1967, as the B&M cut all service on the line except for a single round trip to Haverhill.

[4] The MBTA bought the B&M commuter rail assets, including the Wildcat Branch, on December 27, 1976.

[4] Regular MBTA service via the Wildcat Branch ran until December 2020 and resumed in April 2021.

[9] Beginning May 20, 2024, weekday midday inbound trains were again temporarily routed over the Wildcat Branch during construction work.

[10][11] The line also carries some freight service by CSX Transportation (formerly Pan Am Railways), primarily the train "DOBO" (Dover, New Hampshire, to Boston), which mainly hauls sand and gravel from the New Hampshire Northcoast railroad to the Boston Sand and Gravel facility in Somerville.