Napa Valley Wines: AVAs, Cabernet, History and Visiting

Napa Valley wines are, above all, Cabernet Sauvignon: the grape covers more than half of the valley’s vineyards. Napa is a small place by California standards, about 30 miles long, and it grows only 4% of the state’s wine grapes, but in our view its name on a label carries more weight than any other in American wine. This guide covers the Napa Valley AVA and the 17 smaller AVAs inside it, the main grapes, the 1976 tasting that made Napa famous, how to read the label and what Napa Valley Vintners and Visit Napa Valley say about planning a visit.

Napa Valley by the numbers

Napa Valley Vintners (NVV), the trade association of the valley’s wineries, publishes a set of fast facts. The highlights:

Fact	Figure, per NVV
Share of California’s wine grape harvest	4%
Share of world wine production	0.4%
Valley floor	30 miles long, 5 miles wide at its widest
Vineyard elevations	Sea level to 2,600 feet (800 meters)
Soils	Half of the world’s 12 soil orders; 33 soil series
Red / white grapes	80% / 20% of vineyard acreage
Wineries in Napa County	More than 500
Family-owned wineries	95%
Wineries making under 10,000 cases a year	80%

NVV describes a dry Mediterranean climate, a type found on only about 2% of the Earth’s surface, and says it gives consistent quality from one vintage to the next. It also notes that the Napa Valley Agricultural Preserve was established in 1968, and that nearly 90% of Napa County land is now under permanent or high levels of protection from development.

The grapes

NVV says more than 34 wine grape varieties grow in the valley. Seven make up most of the vineyards:

Grape	Share of vineyard acreage	Acres (hectares)
Cabernet Sauvignon	54%	25,000 (10,117)
Chardonnay	12%	5,628 (2,277)
Merlot	8%	3,632 (1,469)
Sauvignon Blanc	6%	2,553 (1,033)
Pinot Noir	5%	2,409 (975)
Zinfandel	3%	1,270 (514)
Cabernet Franc	3%	1,224 (495)

Cabernet Sauvignon is the star, with more than four times the acreage of Chardonnay, the next grape on NVV’s list.

Chardonnay is the main white; NVV lists it first among the grapes of cool Los Carneros (see below). In our view, Sauvignon Blanc is Napa’s most underrated wine: it costs far less than the Cabernet and shows the valley’s sunny style in a fresher form.

The Napa Valley AVA and its nested AVAs

An AVA (American Viticultural Area) is, in the TTB’s words, a defined grape-growing region with a name, distinguishing features and a delineated boundary. The TTB, the federal agency that regulates wine labels, listed 280 AVAs in the US in August 2026, 154 of them in California.

NVV says Napa Valley was California’s first recognized AVA, designated in 1981. Within it are 17 nested AVAs, smaller areas whose wines can also carry the Napa Valley name. NVV’s descriptions, in brief:

Nested AVA	Character, per NVV	Main grapes
Calistoga	Warm to hot, cool night breezes; almost entirely volcanic soils	Cabernet Sauvignon, Zinfandel
Diamond Mountain District	Reddish volcanic soils; milder extremes than the valley floor	Cabernet Sauvignon, Cabernet Franc
Spring Mountain District	Mostly above the fog line; sandstone and shale	Cabernet Sauvignon, Merlot, Chardonnay
St. Helena	Warm, sheltered valley floor	Cabernet Sauvignon, Merlot, Syrah
Howell Mountain	Above the fog line; shallow volcanic soils	Cabernet Sauvignon, Merlot, Zinfandel
Crystal Springs	Steep hillsides, volcanic ash soils	Cabernet Sauvignon, Sauvignon Blanc
Chiles Valley	Warm days, chilly nights, later harvests	Cabernet Sauvignon, Merlot, Zinfandel
Rutherford	Moderately warm, large day-to-night swing	Cabernet Sauvignon, Merlot
Oakville	Moderately warm; fog keeps acidity	Cabernet Sauvignon, Sauvignon Blanc
Yountville	Marine influence, cool summer mornings	Cabernet Sauvignon, Merlot
Stags Leap District	Afternoon marine winds; volcanic gravel loams	Cabernet Sauvignon, Merlot
Mount Veeder	Cool to moderate, above the fog line	Cabernet Sauvignon, Chardonnay
Atlas Peak	Cool, mountain vineyards; shallow volcanic soils	Cabernet Sauvignon, Chardonnay
Oak Knoll District	Moderate to cool, late-morning fog	Wide range
Coombsville	Moderated by San Pablo Bay	Wide range
Wild Horse Valley	Described by NVV as the coolest Napa AVA	Pinot Noir, Chardonnay
Los Carneros	Cool, marine winds, lowest rainfall in the valley	Chardonnay, Pinot Noir, Merlot

The TTB list notes that Los Carneros also extends into Sonoma County and Wild Horse Valley into Solano County. You may still see a count of 16 (NVV’s fast-facts page has a heading reading “16 AVAs”), but NVV’s text and appellations page list 17, including Crystal Springs of Napa Valley, which also appears on the TTB list.

In our view, the simplest way to use this table is by temperature: NVV describes Calistoga and St. Helena as warm, Rutherford and Oakville as moderately warm Cabernet country, and Los Carneros and Wild Horse Valley as cool, which is where to look for Chardonnay and Pinot Noir.

History: the Judgment of Paris

Napa’s best-known moment came on May 24, 1976. Wikipedia’s account says the British wine merchant Steven Spurrier organized a blind tasting in Paris whose official scores came from nine French judges. They compared ten whites (six California Chardonnays, four white Burgundies) and ten reds (six California Cabernet Sauvignons, four red Bordeaux). The top wine in each group came from Napa Valley:

• the 1973 Chateau Montelena Chardonnay;
• the 1973 Stag’s Leap Wine Cellars Cabernet Sauvignon.

Our history of wine puts the tasting in the longer story.

NVV’s own history adds that the association was founded in 1944, when seven vintners signed a formal agreement, and that it now has 539 active member wineries.

How to read a Napa Valley label

• “Napa Valley”: an AVA. Under TTB rules, at least 85% of the wine must come from grapes grown in the named AVA, and the wine must be fully finished in the state where the AVA lies.
• A nested AVA, such as “Rutherford” or “Howell Mountain”: the same 85% rule applies to that smaller area.
• “California”: a state appellation; the TTB requires at least 75% of the wine from the named state, so the grapes may come from anywhere in California.
• “Napa County”: a county appellation, also with a 75% minimum.
• A grape name: the TTB’s own example is a wine labeled Merlot, which must be at least 75% Merlot. Our red blend guide explains the rule and what the other 25% can be.

Good-value Napa Valley wine

We don’t name specific Napa bottles on this page. Our value picks follow how we rate wine: each needs a published critic score for a named vintage and a US shelf price checked at two or more stores.

Napa Cabernet rarely meets our thresholds, because it usually costs far more than wines with similar scores from elsewhere. In our view, the better value from Napa is Sauvignon Blanc, Merlot and Chardonnay from the broad Napa Valley AVA, judged against our $30 and $45 bands for wines scoring 90 points and above. For Cabernet under $20, our best Cabernet Sauvignon under $20 list looks mostly beyond Napa.

Visiting Napa Valley

These details come from Napa Valley Vintners and Visit Napa Valley and were checked in October 2026. Each winery sets its own policies, so check its site before you go.

• How many places to taste: Visit Napa Valley says there are more than 400 wineries open for tastings and 90 urban tasting rooms.
• Reservations: NVV says some wineries welcome walk-in tastings, but recommends booking ahead “for the most relaxed experience.”
• How many in a day: NVV suggests expecting to visit about three or four wineries in a day, and suggests starting with a tour.
• Tasting fees: Visit Napa Valley says there are budget-friendly options and that some wineries waive the tasting fee if you buy wine.
• Getting around: NVV advises a designated driver or a hired car, eating well, drinking water through the day and using the spittoons. Visit Napa Valley has a section on wine tours and transportation.
• What to wear: Visit Napa Valley suggests “wine country casual” and layers, since tours can pass through caves and chilled cellars.
• When to go: NVV suggests fall or winter for a quieter visit.
• Finding wineries: NVV publishes a map of all its member wineries at napavalley.wine.

Tip: We’d book the one or two wineries you most want to see first, then fill the rest of the day with walk-in tasting rooms in a town such as Napa, Yountville, St. Helena or Calistoga.

Wine is for adults of legal drinking age (21 in the US). Please drink responsibly.