The vineyard and winery is located on Paso Robles' somewhat-controversial Westside. In 2007, a proposal was made to split the Paso Robles AVA into east and west sub-appellations at the Salinas River and its parallel, Highway 101. An AVA is a wine grape-growing region in the U.S. distinguishable by geographic features and the Paso Roble's one, established in 1983, is California's largest. The proposal polarized Paso's wine community and with good reason. The Paso Robles Westside AVA would have become home to the area's more extreme weather conditions, making it neither homogeneous nor ideal. The proposal was withdrawn in 2009 for new proposal suggesting 11 separate and much smaller AVAs.