napa winery road map There are two roads that run along the Napa Valley beginning in the town of Napa. Highway 29 is the main artery from the city of Napa to Calistoga and can be extremely busy on weekends. On the eastside of the Valley is the less traveled Silverado Trail. Many small country road intersect the Valley. These are picturesque roads with many beautiful views of the vineyards. Use our map as your guide. You can also download a pdf file and print your map.