The Santa Cruz Mountains AVA is significantly affected by its relationship with the Pacific Ocean. In this video, David Johnson of Big Basin Vineyards tells Staff Writer & Taster Brian Freedman that while the steep, rocky, forested terrain is important, the ocean is also critical. He describes how fog streams through gaps in the coastal hills, contributing to cold nights even after warm days. This massive diurnal swing is crucial, allowing them to craft wines with the incredible freshness and energy for which the region is renowned.