The Los Olivos District AVA is entirely within the Santa Ynez Valley AVA, sharing a common boundary with Ballard Canyon AVA on the west side, and sharing a common boundary with the Happy Canyon of Santa Barbara on the east side. The northern boundary incorporates for the most part a 1000-foot elevation line which separates the topographically rugged foothills of the San Rafael mountains to the north from the gentle rolling hills to the south. This 1000-foot line also marks the northern boundary limit of the Positas-Ballard-Santa Ynez soil series, the dominant soil type of the Los Olivos District. The southern boundary is defined by the Santa Ynez River, which marks a change in geology and principal soil type.
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