North Coast

• Napa Valley: World-renowned for Cabernet Sauvignon and premium Chardonnay.
• Sonoma County: Diverse, with Pinot Noir, Chardonnay, and Zinfandel.
• Los Carneros: Cooler climate; specializes in Pinot Noir and Chardonnay.
• Mendocino County: Known for organic wines, Pinot Noir, and sparkling wines.
• Lake County: High-altitude vineyards; Sauvignon Blanc and Cabernet Sauvignon.
• West Sonoma Coast: Coastal influence; excellent Pinot Noir and Chardonnay.

Central Coast

• Santa Barbara: Cool climate; Pinot Noir and Chardonnay dominate.
• Monterey County: Coastal breezes; Pinot Noir, Chardonnay, and Riesling thrive.
• Paso Robles: Warm climate; Zinfandel, Syrah, and Rhône-style blends.
• San Luis Obispo County: Diverse, with both cool and warm-climate varietals.
• Santa Cruz Mountains: High-altitude wines; Pinot Noir and Cabernet Sauvignon.
• Livermore Valley: Historic region; Sauvignon Blanc and Petite Sirah.
• San Benito County: Rhône-style wines and unique blends.

Inland Valleys

• Lodi and the Delta: Known for old-vine Zinfandel and bold reds.
• Sacramento Valley: Warm climate; produces affordable wines.
• San Joaquin Valley: High-volume production of various varietals.

Sierra Foothills

• Amador County: Famous for bold Zinfandel.
• El Dorado County: High-elevation vineyards; Rhône and Italian varietals.
• Nevada, Placer, Yuba, and Calaveras Counties: Boutique wineries with diverse varietals.

Southern California

• Temecula Valley: Mediterranean climate; produces a range of varietals, including Syrah and Viognier.
• Los Angeles County: Historic wine region with small-scale producers.
• San Diego County: Warm climate; focuses on Rhône and Mediterranean varietals.
• Cucamonga Valley: Known for Zinfandel and fortified wines.

Far North California

• Cooler, mountainous regions producing boutique wines and unique varietals.

Source: https://capstonecalifornia.com/resources