Green Spring Valley Historic District is a national historic district near Stevenson in Baltimore County, Maryland, United States. It is a suburban area of Baltimore that acquires significance from the collection of 18th, 19th, and early 20th century buildings. The park-like setting retains a late 19th-early 20th century atmosphere. At the turn of the 20th century, the Maryland Hunt Cup and the Grand National Maryland steeplechase races were run over various parts of the valley. The Maryland Hunt Cup, which began as a competition between the Green Spring Valley Hunt and the Elkridge Hunt, traditionally started at Brooklandwood, the previous home of Charles Carrol of Carrollton with the finish across Valley Road at Oakdene, at that time the home of Thomas Deford, which remains a private residence