Here's the best of the best, a country road trimmed with shady oaks and world-class wines, with so many wineries you could travel it for a week straight and still not visit them all. The first permanent road linking the town of Napa to Calistoga, roughly 30 miles/48 kilometers south, the Silverado Trail is the country-road counterpart to busier Highway 29, which roughly parallels the route. Drive—or better yet rent a bike and pedal—along this tranquil, scenic route, snugged up against the valley's eastern hills.