It's a winding, uphill drive to reach secluded Robert Keenan, but this far off the tourist track you're guaranteed more elbowroom at the tasting bar and a quieter, less commercial experience.

Behind the 10,000-case annual production of primarily full-bodied reds is native San Franciscan Robert Keenan, who ran his own insurance agency for 20 years before purchasing his "retirement property" and launching a second career. But the 176-acre estate (48 acres of which are now planted with grapes), dates back to 1890 when it was founded as the Conradi Winery.

Drop by to sip mountain cab, merlot, chardonnay, cabernet franc, and zin, which range from $29 to $57 per bottle. Older vintages, which you won't find elsewhere, are for sale here as well. Take the tour to learn about the vineyards, production facilities, and winemaking in general. Those looking for a pastoral picnic spot should consider spreading their blankets out here. The three tables, situated right outside the winery and surrounded by vineyards, offer stunning views.