History
Jensen picked grapes at Domaine de la Romanee-Conti in 1970 and Domaine Dujac in 1971 and came home convinced that limestone was what California Pinot Noir lacked. The search ended high in the Gavilan Range of San Benito County: Jensen, Selleck and Reed went in on St. George rootstock in 1975, and an abandoned rock-crushing works on Cienega Road below became Calera's gravity-flow winery. Mills followed in 1984, the same year as the estate's first Chardonnay (Viognier had gone in the year before, in 1983), named for Everett Mills, a Cienega Valley neighbor and friend of the founder; Prince of Pinot records him as the man who built those mining works, whose retaining walls the winery still occupies. Duckhorn has owned the estate since 2017, Jensen died in June 2022, and Mike Waller, hired from Chalone in 2007, farms and makes the wines. A partial replanting is under way: roughly two acres had been turned over as of early 2026, the remainder still in production.
The Site
Fourteen acres and change on the eastern side of the Mount Harlan estate, between 2,200 and 2,300 feet, on south-facing hillsides falling away toward Harlan Creek. Published acreage runs from 14.1 in the winery's older tech sheets to 14.4 in Prince of Pinot's accounting. The soils are why the estate exists at all: calcareous, limestone-derived ground over one of California's larger deposits of pure limestone, cooled by elevation at roughly three degrees per thousand feet and by marine air off Monterey Bay, 25 miles west. Mills sits inside the Mt. Harlan AVA, approved in 1990 with Calera as its only winery, and the estate vineyards have been CCOF-certified organic since 2008. Yields across the property rarely exceed two tons per acre and have run closer to one in recent vintages.
Vines and Blocks
Pinot Noir on its own roots, planted in 1984 with a further block in 1998, all of it the Calera selection propagated from the original 1975 vines. The origin of that material is trade legend rather than record: the paper trail points to neighboring Chalone, the legend to cuttings carried out of Burgundy, a question Jensen spent decades declining to settle. A claim in circulating study material that Mills is grafted onto St. George inverts the history; St. George carried the 1975 vineyards, while Mills went in ungrafted, which makes its 1984 vines the oldest own-rooted Pinot Noir on the estate.
The Wines
Calera is the only producer, bottling the block as Mt. Harlan Pinot Noir Mills Vineyard in the house manner: whole clusters, native yeast, unfined and unfiltered in most vintages, around 18 months in French oak of which about 30 percent is new. Against the sterner 1975 vineyards Mills is the round one, plusher and darker in fruit, fragrant and spicy, with the sassafras and mint that run through the Calera designates; recent vintages have landed near 14.5 percent alcohol. Retrospective tastings of the designates going back to the 1980s show the wines holding for twenty years and more.