San Juan Creek is dissected by CA Hwy 41 in the middle east of Paso Robles AVA around the town of Shandon. The topograhy of San Juan Creek is younger river valleys with alluvial terraces and fans as this area is a tributary to the upper Estrella River. Elevations range 980 – 1,600 feet.

Soils are well to moderately drained, deep alluvial, sandy loams to loams to clay loams on the highest, oldest terraces.