California's Red Varietal Wines
The most popular red varietal wines in California include Cabernet Sauvignon, Merlot, and Zinfandel (a red wine and also a pink wine). Pinot Noir and Syrah/Shiraz are also fairly popular red varietal wines.
Varietal wines are named after their sole or dominant grape variety. U.S. federal regulations dictate that a wine must derive at least 75 percent from the grape variety that’s named on the label.
Cabernet Sauvignon
The Cabernet Sauvignon grape variety is California’s most-planted red wine grape, representing about 23 percent of California’s red wine production. It grows well in most parts of the state, with the exception of the very coolest regions, such as many coastal areas.
At the least expensive end, Cabernet Sauvignon wines are fruity, medium-bodied, flavorful wines that have a bit of sweetness. At medium to high price levels, Cabernet Sauvignon wines are fairly full-bodied with firm tannin and are often capable of aging for a few years after you purchase them.
Cabernet Sauvignon wines have aromas and flavors of black currants or other small black berries, sometimes a minty or other herbal note, and often toasty, smoky, or vanilla-like suggestions from the oak that’s used in making the wine.
Zinfandel
Zinfandel wines are a special case because the majority of them are not red wines but sweetish pink wines, labeled as White Zinfandel. The grape itself is red, and the Zinfandel wines that aren’t labeled as white are in fact usually very hefty red wines.
Zinfandels have rich flavors of berry fruit, particularly blackberries and loganberries. The wines are medium-bodied or full-bodied and very fruity. They tend to be even higher in alcohol than other red wines. The less expensive Zinfandels are generally moderate in tannin and meant for drinking young, whereas the pricier Zinfandels have a firm tannin backbone that enables them to age.
Merlot
The Merlot grape is California’s third most popular red grape variety, after Cabernet Sauvignon and Zinfandel. The Merlot grape doesn’t grow well just anywhere, however, and the quality and taste of Merlot wines can vary quite a lot depending on whether the grapes grew in an area that’s more or less suitable for this variety.
Merlot wines are generally full-bodied and have aromas and flavors of plums, other dark fruits, and sometimes tea or chocolate. Because the Merlot grape has less tannin than the Cabernet Sauvignon grape, Merlot wines tend to be a bit softer in texture than Cabernet Sauvignon.
Other California Red Varietals
Other red varietal wines that you might encounter in the California section of your wine shop include the following:
Pinot Noir: The Pinot Noir grape grows at its best only in certain vineyard areas; it doesn’t do well in warm conditions. Plenty good-quality Pinot Noirs exist, mainly from cool coastal vineyards. Two key characteristics of Pinot Noir wines are their abundance of fruity aromas and flavors and their relatively low amount of tannin. The wines are usually fairly full-bodied and high in alcohol.
Syrah/Shiraz: The Syrah grape has grown in California for decades, but varietal Syrah wine has really taken off only recently. Syrah or Shiraz varietal wines are generally moderate in tannin and full of berry flavors — sometimes with nuances of spiciness (such as black pepper), earthy notes, or smoked meat flavors, but more often than not, just juicy fruitiness.
Cabernet Franc: This red grape is, as the name suggests, related to Cabernet Sauvignon, and it’s used in many varietal Cabernet Sauvignons, some varietal Merlots, and many red Meritage blends. As a varietal wine in its own right, it tends to have notes of red fruits rather than the black-fruit character common in Cabernet Sauvignon and Merlot. It’s somewhat less tannic and firm and is somewhat fruitier than comparably priced Cabernet Sauvignons.
Grenache: This red grape variety is common in blended Rhône-style red wines. On its own, it makes full-bodied red wines that are high in alcohol and not very tannic, unless they have tannin from aging in oak barrels.
Petite Sirah: This grape variety is an old-timer and something of an original in California. The French know it as the Durif variety, and it’s fairly obscure. But it has a loyal following in California among some winemakers and some wine drinkers. The wines are deeply colored, full-bodied, tannic, and powerful, with aromas and flavors of dark fruits and black pepper.
Sangiovese: Some winemakers once had big plans for varietal Sangiovese wines in California — and some still pride themselves in this wine, although it has proven to be challenging to make. Sangiovese is Italy’s major red grape, particularly famous in wines from the region of Tuscany, such as Chianti. In California, the wines are fairly full-bodied and firm in tannin.

Wine Glossary
American Viticultural Area; AVA
In the United States, a term that defines the geographical boundaries of a specific wine zone or region. For example, Napa Valley is the name of the AVA within Napa County.

Wine Glossary
AOC
An acronym for Appellation d’Origine Contrôlée (the shortened form is Appellation Contrôlée, or AC). AOC is a classification relating to the quality of a wine produced in the European Union (EU).

Wine Glossary
AOQS
An acronym for Appellation d’Origine de Qualité Supérieure. AOQS is a classification relating to the quality of a wine produced in the European Union (EU); in this case, refers to a wine of superior quality.

Wine Glossary
appellation
In the European Union, a registered place name listed on a wine label that indicates the origin of the wine. Sometimes called appellation of origin.

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aroma
A wine descriptor that refers to how a wine smells.

Wine Glossary
balance
A standard that wine experts use to judge wine quality; the relationship of four components (acidity, sweetness, tannin, and alcohol) to each other.

Wine Glossary
body
A wine descriptor that explains how heavy a wine feels in your mouth (often related to the alcohol content). Wines are often described as light-bodied, medium-bodied, or full-bodied.

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bouquet
A wine descriptor that refers to how a (typically well-aged) wine smells.

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complexity
A standard that wine experts use to judge wine quality; refers to a characteristic of a wine that has multiple flavors and aromas (usually a better quality wine).

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crisp
A wine descriptor that refers to a wine with refreshing (typically high) acidity.

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decanter
A glass container that can hold the contents of an entire bottle of wine; often used to aerate the wine (let it breathe before consuming).

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depth
A standard that wine experts use to judge wine quality; indicates a wine that gives the impression of having many layers (rather than being "flat" tasting).

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DO
An acronym for Denominação de Origen. DO is Portugal’s highest quality ranking for their wines.

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DOC
An acronym for Denominazione di Origine Controllata. DOC is a classification referring to a quality wine produced in Italy.

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DOCG
An acronym for Denominazione di Origine Controllata e Garantita. DOCG is a classification relating to a small group of elite (high-quality) wines produced in Italy.

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dry
A wine descriptor that refers to a wine that is not sweet. Wines can be classified as dry, off-dry (or semi-sweet), or sweet.

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fermentation
The process (during winemaking) in which yeasts convert the sugars in a grape juice to alcohol and carbon dioxide.

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finish
A wine descriptor that refers to the impression a wine leaves in your mouth after you taste and swallow it (the aftertaste). A standard used to judge wine quality.

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flavor intensity
A wine descriptor that refers to how strong or weak a wine's flavors are.

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fruity
A wine descriptor that refers to a wine that has aromas and flavors that suggest fruit.

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IGT
An acronym for Indicazione di Geografica Tipica. IGT is a table wine classification for Italian wines that list a geographic location on the wine label.

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length
A standard that wine experts use to judge wine quality; indicates a wine that you can taste on the full length of your tongue, rather than just the front of your tongue.

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oaky
A wine descriptor that refers to a wine that has flavors of oak, usually due to storage in oak barrels.

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palate
A term that wine tasters use synonymously for mouth.

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QbA
An acronym for Qualitätswein bestimmter Anbaugebiet. QbA is a classification referring to a quality wine from a special region in Germany.

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QmP
An acronym for Qualitätswein mit Prädikat. QmP is a classification referring to a quality wine with special attributes produced in Germany.

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QWPSR
An acronym for Quality Wine Produced in a Specific Region. QWPSR is a classification referring to quality European wines that have official place names.

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sediment
Refers to solids (tannin and other matter) that develop in some red wines over time.

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soft
A wine descriptor that refers to a wine with a smooth feel in the palate; usually refers to wines with low acidity.

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sommelier
An expert wine specialist who typically assembles a wine list and recommends wines that pair with specific foods.

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tannic
A wine descriptor that refers to a firm, red wine that leaves a dry feel in the palate.

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tannin
A substance in grape skins that contributes to how a red wine tastes.

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terroir
A French word (pronounced ter wahr) that refers to the unique combination of topsoil, climate, altitude, and other natural factors that a particular vineyard or wine region has.

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typicity
A standard that wine experts use to judge wine quality; refers to whether a particular wine is true to its type (for the specific grape variety).

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varietal
A wine that is named after the principal (or sole) grape variety used to produce the wine.

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vintage
The year in which the grapes for a specific wine were grown and harvested.

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VR
An acronym for Vinho Regional. VR indicates a table wine classification for Portuguese wines.