I've had the pleasure (usually!) of visiting the following wineries and/or tasting rooms.
Beaulieu Vineyard (Napa)
Beringer Winery (Napa)
Black Sheep Winery (Calaveras County)
Bonny Doon Vineyard (Santa Cruz)
Byron (Santa Maria Valley)
Castello di Amorosa (Napa)
Ceja Vineyards (Napa)
Domaine Chandon (Napa)
Elizabeth Spencer (Napa)
Francis Ford Coppola Winery (Sonoma)
Frog's Tooth Winery (Calaveras County)
Evan's Ranch (Santa Ynez Valley)
Girard Winery (Napa)
Grey Wolf Cellars (Paso Robles)
Grgich Hills Estate (Napa)
Gundlach Bundschu (Sonoma)
Hall Winery St. Helena (Napa)
Hope and Grace Wines (Napa)
J. Lohr (San Jose)
Kelham Vineyards (Napa)
Kunde Family Estate (Sonoma)
La Crema Winery (Sonoma)
L'Aventure (Paso Robles)
Long Meadow Ranch (Napa)
Merryvale Vineyards (Napa)
Milliare Winery (Calaveras County)
Moshin Vineyards (Russian River Valley)
Mumm Napa (Napa)
Municipal Winemakers (Santa Barbara County)
Murphy-Goode Winery (Sonoma)
Newsome-Harlow- Vineyards (Calaveras County)
Prager Winery and Port Works (Napa)
Qupe/Verdad/Ethan (Central Coast)
Ravenswood Winery (Sonoma)
Rhys Vineyards (Santa Cruz Mountains)
Ridge Vineyards (Santa Cruz Mountains & Lytton Springs)
Robert Mondavi Winery (Napa)
Rubicon Estate (Napa)
Sebastiani Vineyards and Winery (Sonoma)
Silver Mountain Winery (Santa Cruz Mountains)
St. Clement Vineyards (Napa)
Sterling Vineyards (Napa)
Thomas Fogarty Winery (Santa Cruz Mountains)
Twisted Oak Winery (Calaveras County)
Twomey (Sonoma)
Wild Heart Winery (Calaveras County)
Woodside Vineyards (Santa Cruz Mountains)