Once & Future operates in Calistoga, the northern anchor of Napa Valley known for volcanic soils and intense sun exposure that shape bold, structured wines. The winery focuses on Zinfandel and Petite Sirah—varieties that thrive in the region's heat and demand. The Teldeschi Vineyard Zinfandel and Bedrock Vineyard Zinfandel represent the house's work with this varietal across distinct terroirs, while the Palisades Vineyard Petite Sirah showcases the darker, more tannic expression the region yields. These wines have been assessed by Wine Advocate, Wine Enthusiast, and Decanter. Calistoga's volcanic character and warm diurnal patterns produce wines with ripe fruit, structured tannins, and the mineral undertones that define the appellation's best expressions.