The Estrella District lies in the far north of the Paso Robles AVA and is on the East side. The topography comprises the rolling plains of the Estrella River valley and terraces. Elevations range 745 - 1819 feet.
Soils are typified by Quaternary alluvial soils of diverse ages across younger to older terraces with deep to moderate depth. Remnant patches of older valley fill at highest elevations of the District can be found.