The Geneseo District sits between the Estrella District to the north and the El Pomar District to the south. The topography is characterized by upfaulted hills through old river terraces along the Huerhuero–La Panza fault. Elevations run 740 - 1,300 feet.

Soils are considered old alluvial terrace and residual hillside soils of moderate depth with cementation of the gravelly Paso Robles Formation and older granites.