North Quincy is a neighborhood of Quincy, Massachusetts. It is separated from the city of Boston by the Neponset River, and borders the Quincy neighborhoods of Squantum, Montclair and Wollaston. It contains the smaller neighborhoods of Atlantic (sometimes used as a synonym for North Quincy) and Norfolk Downs, as well as much of Wollaston Beach. Originally referred to as Billings Plain, the area - once largely marshland and part of the Neponset River drainage - was utilized as training and parade grounds by local militia. It was subsequently home to a race track operated by the Jockey Club of Boston in the 19th century.