Rio Vista Vineyard Rio Vista Vineyard: At 22 miles from the ocean this is possibly the warmest grape growing area in the Santa Rita Hills AVA. Rio Vista is now actually three vineyards planted a mile or so apart down a winding road. We source from the vineyard planted in 2000 to the 667, 777, 2A and 115 clones on 101-14 and 110R rootstock. The soil is a marine layer of sandy loam over limestone. The vines are perfectly farmed on unilateral cordons with vertical shoot position and are spur pruned.