The Green Ridge Railroad was a 3 ft (914 mm) narrow gauge railroad that operated in Allegany County, Maryland.
The rail line was located 8 miles east of Cumberland, in the vicinity of Town Hill and Fifteen Mile Creek. It belonged to the Mertens family, and supplied lumber to a sawmill at Oldtown for use by the Merten's boatyards in Cumberland to construct and repair canal boats. The railroad operated from 1889 to 1897. It ended at the Chesapeake and Ohio Canal, across the Potomac River from Paw Paw, West Virginia.
The two locomotives for the GRRR were built at Mount Savage, Maryland, for T. H. Paul, under contract.
Disposition of the engines is unknown.