The grapes that comprise the Magnus vintages are curated form the most lauded growers of California’s renowned Napa and Sonoma valleys. Franciscan monks planted the area’s first wine-producing vineyards in the early 1800s. The valleys emerged as one of the world’s leading vinicultural centers in the famous Paris Wine Tasting of 1976.

Flanked by mountains to the north and west, Napa valley gently rises from sea level to 110 meters above at the foot of Mount Helena. Over the centuries the San Pablo Bay has occupied and receded from the valley floor, leaving sedimentary deposits to combine with the volcanic ash from ancient lava flows. Napa’s distinctive mesoclimates have combined with the panoply of soils to create a diverse and exciting growing environment.

Sheltered from the Pacific Ocean air by Mount Sonoma, the Sonoma valley has a unique terroir and a varied climate free from the excessive rainfall that often comes to Northern California. Overlapping both the foggy Russian River watershed and the Carneros region, Sonoma’s expansive valley floor enjoy dry, mild days, whereas the rocky terrain along the mountains basks its grapes in captured heat from the sun until cool Bay breezes take over in the afternoon. Sonoma is renowned for its heritage old-vine Zinfandel, much of which comes from vineyards more than a century old.