Korbel Champagne Cellars (13250 River Road) makes fine sparkling wines. Join their tour to learn how they're made, and enjoy a taste afterward. Korbel also produces a nice sherry available only through the winery.
From Korbel, continue east several miles, then turn left on Wohler Road.
Where Wohler Road turns abruptly left, you will cross Wohler Bridge, one of Sonoma County's 12 historic bridges. This one-lane bridge was built in 1922 by the American Bridge Company. Shortly past the bridge, Wohler Road ends. Turn right onto Westside Road. Continue North on Westside Road.