The Lancaster Valley AVA is an American Viticultural Area located in Lancaster and Chester counties of southeastern Pennsylvania, centered on the city of Lancaster. The wine region includes 225000 acre in a valley that is roughly 30 mi long and 12 mi wide, although only 400 acre are planted to grapevines. The Lancaster Valley area is one of the most fertile agricultural areas in Pennsylvania, and features rich topsoil over limestone bedrock. It has a hot-summer humid continental climate (Dfa) and is located in hardiness zone 7a.