Wine fans, this should be on your bucket list: a California wine tour.

Start with the state’s top-notch Napa and Sonoma counties. They’re wonderlands of wine, with more than 600 wineries between them.

Stroll through vineyards. Watch grapes being picked (in season) and wine being made (when it’s time). Sample a few, sometimes free, although often for a fee for top reserve wines.

Dine at top-rated wine country restaurants, some in the region’s cities, some at its wineries. Get married in an outdoor bower surrounded by vines, or indoors beside barrels of aging wines, choosing among many package deals.

There’s no end to the tours:

Beringer Vineyards in Napa offers several, including a one-hour, $45 “Taste of Beringer” tour with a walk through a demonstration vineyard and a seated wine-and-food pairing with culinary treats prepared by Beringer executive chef Daryl Muromoto. 2000 Main St., St. Helena; 707-257-5771,

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Cline Cellars in Sonoma offers a free tasting of five Rhône-style wines, or a flight of five reserve wines for $15. 24737 Arnold Dr., Highway 121, Sonoma; 800-546-2070,

If you’re an art fan, check out the serious exhibits right in the wineries at Hess Collection (4411 Redwood Rd., Napa; 707-255-1144, and Clos Pegase (1060 Dunaweal Lane, Calistoga; 707-942-4981,

Here are some tips to make it more fun:

  • Do your homework. At some wineries you can just show up. But you should check websites or email ahead to see if they welcome guests, what tours they have and what they charge.
  • If you want to dine at a really top wine country restaurant, check its website months in advance — literally. Some have intricate rules for taking reservations. Also check their prices. Prepare to wince.
  • Appoint a designated driver. No kidding. If you taste five wines each at five different wineries in a day, you’ll be in no condition to drive back to your hotel.
  • Even better, rent a limo. Gather some friends and be chauffeured to wineries. Six to eight wine fans can book a six-hour chauffeured limo tour of Napa or Sonoma wineries for $300 and up.
  • Spit, don’t swallow when you’re tasting. People hate this, I know. But if you don’t, you’ll dull your palate in the first hour and be asleep in your car by lunchtime. If you’re shy about spitting into the buckets provided at the tastings, bring a little plastic cup, spit into it, then discretely dump it into the bucket. Make a lame joke about it being on your bucket list.
  • Have a picnic lunch. Napa and Sonoma have lots of little gourmet shops where you can buy takeout dishes or sandwich makings. And many wineries have picnic tables for your use. Point of etiquette: If you use a winery’s table, buy a bottle of wine from that winery. It’s uncool to sit at Winery A sipping a bottle from Winery B.
  • Finally, know your limits. Enough said.