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Atlas Peak in Napa County, California, is the name of one of the county's highest points and the AVA which surrounds it. The peak reaches 811m (2663ft), falling only slightly short of Mount Vaca to the south-east and Sugarloaf Mountain at the northern edge of the Howell Mountain AVA. It lies on the western side of the Vaca Mountains, the range which separates the Napa and Sacramento valleys.

The smaller Foss river, rather than the larger Napa river, is largely responsible for the terroir in this Napa sub-region; every Atlas Peak vineyard is located within the Foss Valley. The Foss flows down from the Milliken Reservoir, bypassing the AVA's two key wineries (Antinori California and Atlas Peak) before plunging down a deep, narrow gorge and into the Rector Reservoir below. Beyond the reservoir, the Foss eventually meets the Napa halfway between Oakville and Yountville.

The highest vines in the Atlas Peak AVA are planted at 510m (1665ft) above sea level. This altitude is viticulturally important in its own right, but perhaps the most significant thing about Atlas Peak's vineyards is their elevation above other Napa Valley vineyard areas. The floor of the Napa Valley around Oak Knoll is less than 50ft (15m) above sea level, and there are tangible differences between grapes from the hot valley floor and those from the cooler, brighter air on the mountainsides. Wines made from grapes further up lean towards finer, classic styles, with good acid/sugar balance, while wines from grapes on the valley floor are more powerful and fruit forward.

Atlas Peak grapes enjoy long, warm summer days, but are afforded the chance to cool down at night thanks to the increased diurnal temperature variation. The soils are mostly volcanic and highly porous, which aids drainage and prevents waterlogging. This kind of terroir lends itself naturally to low-yield, high-quality wines.

As is the case in most other Napa AVAs, Atlas Peak shows a heavy preference for Cabernet Sauvignon, which accounts for more than half of the vineyard area. The classic Atlas Peak Cabernet Sauvignon is noticeably finer than the traditional, muscular 'Napa Cab', and leans in the direction of European/Old World reds. Zinfandel takes second place among the reds, followed by small quantities of Merlot, Syrah and Sangiovese. Atlas Peak's white wines are made almost exclusively from Chardonnay.

The producers of Atlas Peak wines (a number of wineries outside the AVA buy in Atlas Peak fruit) have made the most of their natural advantages, highlighting their vineyards' altitude on bottle labels and in promotional materials.

However in October 2017, Atlas Peak was the starting point for one of the many wildfires which destroyed large areas of northern California's wine country.