|Length||29 mi (47 km)|
|Southeast end||SR 121 at Soscal Road in Napa|
| SR 121 at Trancas / Monticello
SR 128 in St. Helena
|Northwest end||SR 29 (Lincoln Ave.) in Calistoga|
The road began as a trail built in 1852 after flooding made the main Napa Valley road impassable. Later, it served as a wagon trail to link cinnabar mines on Mount St. Helena to San Pablo Bay, the northern portion of the San Francisco Bay, and was the first permanent road from Napa to Calistoga.
Silver was discovered in Napa Valley in 1858, and wine production began in the 1870s, making the road an important trade route. Charles Bolles, a highway bandit also known as "Black Bart", preyed on the road's travelers in the 1880s. Safety improved when motorized bus service began in 1910. A Phylloxera plague and Prohibition forced most but not all of the local wineries out of business.
The area thrived with the growing prominence of California wine. One of the wineries on the road, Stag's Leap Wine Cellars, made Napa Valley world famous in 1976 when it won the Judgment of Paris, a promotional wine competition among French and California wines. Today, at least 40 of the Valley's more than 200 wineries are along or near the road.
|Napa||SR 121 at Soscal Road in||Southern terminus|
|1st street||COPIA, Ritz-Carlton Hotel (approved project)|
|Coombsville Rd. / 3rd street|
|SR 121 at Trancas St. / Monticello Ave.|
|Oak Knoll Ave.||Silverado Country Club, Clos Du Val Winery, Andretti Winery|
|Yountville||Yountville Cross Rd.||Stag's Leap Wine Cellars, Stags' Leap Winery, Silverado Vineyards Winery|
|Oakville||Oakville Cross Rd.|
|St. Helena||SR 128|
|Pope St. / Howell Mountain Rd.|
|Deer Park Rd.||Duckhorn Vineyards|
|Calistoga||SR 29 (Lincoln Ave.)|
- silveradotrail.com - Silverado Trail Association (industry site)
- Map - from Silverado Trail Association