About Andesite Vineyard
Andesite Vineyard takes its name from the volcanic rock that defines its mountain vineyard site above Calistoga. The estate sits on the western slopes of the Mayacamas range, where ancient volcanic soils and extreme elevation produce wines of exceptional mineral character and intensity. The vineyard is planted primarily to Cabernet Sauvignon with smaller blocks of Syrah, all farmed sustainably to work with the challenging mountain terrain.
The volcanic andesite soils are the defining feature of this estate — thin, well-drained, and mineral-rich, they naturally limit yields and force vine roots deep into the fractured rock below. This stress produces berries of remarkable concentration with firm, fine-grained tannins and a distinctive savory quality. Winemaking is done with a gentle hand to preserve the mountain character, using French oak aging and minimal fining or filtration. The wines are powerful yet precise, with the kind of structure that rewards patient cellaring.
Visits to Andesite Vineyard are by appointment only and offer a rare opportunity to experience mountain viticulture up close. The estate setting is dramatic, with panoramic views of the Napa Valley floor hundreds of feet below. Tastings typically include a vineyard walk to see the volcanic soils firsthand, followed by a seated tasting of estate wines. The experience is educational and immersive, ideal for wine lovers who want to understand the relationship between geology and flavor.
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