California’s Napa Valley is bounded by the Mayacamas Mountains to the west and by the Vaca Mountains to the east and is about 35 miles north of San Francisco. In many wine regions, there can be a significance quality variance from winery to winery, but it takes considerable effort to find a Napa Valley winery not making excellent wine. The valley includes the city of Napa at the southern end and the city of St. Helena at the northern end. The Napa climate is influenced by elevation and distance from San Pablo Bay. During the day, valley floor vineyards reach higher temperatures than do higher elevation vineyards, and temperature tends to increase as you move further away from San Pablo Bay. Night temperatures are higher in mountain vineyards than they are in valley floor vineyards. These different climates, and soils, can create nuances in the resultant wines produced by Napa wineries that are the focus of countless discussions and debates among Napa wine enthusiasts. Napa is California’s most developed and visited wine area with over 900 wineries. Napa wineries make between 200 and 5,000,000 cases with the average somewhere around 7000 cases. Scroll down to find Napa Valley’s best wineries. The “Highest Visitor Ratings” section lists Napa wineries that have received visitors’ highest ratings for service, views, and wine quality. The “Highest Wine Critic Ratings” section lists the producers of Napa’s best wines based on awards won at international wine competitions and ratings from publications such as Wine Spectator, Wine Enthusiast and The Wine Advocate. The “All Napa Valley Wineries” section contains a comprehensive, and continuously updated, list of Napa wineries. Click “map view” to access the advanced winery search to find wineries that provide vineyard lodging, have food available to complement their wines, host vineyard weddings, or produce wines from organic grapes. We make it easy to find the best wine tour and tasting destinations in Napa wine country.