Dunn Vineyards produces 100% Cabernet Sauvignon under two labels: Howell Mountain and Napa Valley. Around 2500 cases of Howell Mountain and about 1500 cases of Napa Valley are made each year. The Howell Mountain Cabernet is from 100% percent Howell Mountain fruit, while the Napa Valley includes up to 15% Napa Valley floor fruit, with the remainder of the fruit coming from Howell Mountain. This floor fruit contributes to the wine’s softer approach, even though the wines usually can be laid down for 15+ years.

The bottles differ in two ways: The Napa Valley has a foil seal, whereas the Howell Mountain has been hand dipped in red wax. The Howell Mountain wine label bears both h the sub appellation Howell Mountain, as well as the appellation Napa Valley while the Napa release only reads Napa Valley. The Napa Valley Cabernet Sauvignon is usually more approachable at a younger age with its softer tannins whereas, the Howell Mountain Cabernet Sauvignon is massive in fruit and tannins.

Dunn Vineyards’ 2021 Cabernet Sauvignon Howell Mountain is a classic, estate-driven Napa mountain Cabernet from a longtime Howell Mountain specialist. Founded in 1979 by Randy and Lori Dunn, the family estate farms about 42 acres on Howell Mountain, and this bottling is 100% Cabernet Sauvignon. Decanter notes it was “fermented in stainless steel tanks” and “aged up to 32 months in 100% new French oak,” a regimen Vinous pegs at 31 months and calls “pretty much the norm here.” Wine Spectator reports “2,583 cases made.”

This is a dark, concentrated wine built around Howell Mountain structure, but the top reviews emphasize polish as well as power. Decanter (98) highlights its “incredibly intense, mineral-driven profile,” with tannins likened to “iron fist in a velvet glove,” and flavors that move from “tart red berries and black cherries” to “sagebrush, cedarwood, and warm brown spices.” James Suckling (98) similarly finds it “robust and brooding,” with “mulberry bush, violets, cedar, cocoa and graphite,” and a “full-bodied” palate where “refined tannins and bright acidity” frame blackcurrant, tobacco leaf, and “crushed river stones.”

Jeb Dunnuck’s 98+ is an especially strong endorsement, calling it “a deeper, richer, more powerful wine” with a “Pauillac-like nose of blackcurrants, scorched earth, graphite, and lead pencil,” followed by “classic Howell Mountain tannic structure” and “a gorgeous finish.” Vinous (97) goes further on refinement, describing it as “one of the most polished young wines I have ever tasted from Dunn,” with tannin and acidity “totally woven into the wine’s heady, luxurious fabric,” while still advising patience.

Robert Parker’s Wine Advocate (96), via Joe Czerwinski, places it “just under 14% alcohol” and stresses balance: “ripe and relatively silky” tannins, “tremendous length and ample harmony,” alongside cedar, cassis, blueberries, pine needles, and rubbed sage.

Multiple critics converge on a long window. Suckling suggests it’s “best from 2028,” and Wine Spectator (97) agrees: “Patience is required… Best from 2028 through 2045.”