Ben Lomond Mountain AVA
The Ben Lomond Mountain AVA is an American Viticultural Area in Santa Cruz County, California, located on the western edge of the Santa Cruz Mountains. Jim Beauregard established the AVA in 1983, Beauregard Vineyards and Soquel Vineyards continue to be only wineries that currently produce wine bearing the Ben Lomond Mountain AVA designation. Vineyards were first planted on the mountain in the 1860s sitting at a premium spot for grape growing. The appellation ranges in altitudes as high as  above sea level to 1300 feet, placing it between the fog that rolls in from the Pacific Ocean, ensuring long hours of sunlight and long growing season

References 

American Viticultural Areas of the San Francisco Bay Area
Geography of Santa Cruz County, California
American Viticultural Areas
American Viticultural Areas of California
Wineries in Santa Cruz Mountains
1987 establishments in California