It’s definitely a different approach to a day of tasting in Wine Country, but here it is: beer.

Following the successful concept of the million or so wine tasting tours to be found in the North Bay, three Rohnert Park entrepreneurs have come up with something new. Brothers Ron and James Holt and business partner Rob Watkins have formed North Bay Brewery Tours, offering guided bus tours of Sonoma and Marin breweries.

Apparently, people have been craving just the thing, since the magic beer bus hits the road this Saturday with a nearly sold-out group (as of this morning, just two seats remained).

The list of beer-related attractions is still being fine-tuned as interest grows, but it already features several significant suds factories, including Lagunitas Brewing Company in Petaluma, Bear Republic Brewing Company in Healdsburg, and Russian River Brewing Company in Santa Rosa. Other participants include Broken Drum Brewery in San Rafael, Stumptown Brewery in Guerneville, Hopmonk Tavern in Sebastopol and Sonoma, Dempsey’s Brewery in Petaluma, Ruth McGowan’s Brewpub in Cloverdale and Third Street Aleworks in Santa Rosa. There’s also a visit to The Beverage People, a make-your-own-craft-beer shop in Santa Rosa.

Only serious beer nuts need board. Each Saturday-only tour lasts about six hours, hitting up to five locations with plenty of tasting through the day and a spot of lunch to help soak it up.

North Bay Brewery Tours: 707-602-7397 or northbaybrewerytours.com.