Hillyrock Farm is operated by Bob and Diane Browning with support and guidance from master farmer and neighbor, Ralph Warren, Jr. Hillyrock is located in a savannah in the Greenbrier Valley—the high and lush valley in the Allegheny Mountain range of West Virginia—on grassland that is rich in minerals and fed with a mountain spring. The farm has been in operation for over 200 years and is listed on the National Register of Historic Places.