Napa’s big harvest date

Napa just put one of its biggest late-summer wine dates on the calendar: Harvest STOMP is set for Saturday, August 22, 2026, with Opus One Winery in Oakville hosting and John Anthony Vineyards presenting the event. The gathering runs from 6 p.m. to 11 p.m. and marks the 19th annual edition. (harveststomp.com) (wineindustryadvisor.com) This is not just another tasting-room party. Harvest STOMP is the Napa Valley Grapegrowers’ annual fundraiser, and the event website says it helps support both the Napa Valley Grapegrowers and the Napa Valley Farmworker Foundation. (harveststomp.com) (farmworkerfoundation.org) The money goes to two different parts of Napa’s wine machine. Napa Valley Grapegrowers says its work centers on education, advocacy, conservation, and preserving Napa Valley’s agricultural heritage, while the Farmworker Foundation says its mission is education and professional development for vineyard workers. (napagrowers.org) (farmworkerfoundation.org) That split explains why the date lands so early. The event bills itself as the fundraiser that “kicks off harvest,” which means it arrives right as vineyards move from summer canopy work into the picking season that drives the valley’s busiest stretch. (harveststomp.com) The 2026 host matters too. Opus One sits in Oakville at 1144 Oakville Cross Road, and the winery is one of Napa’s best-known luxury names, with roots in the partnership between Baron Philippe de Rothschild and Robert Mondavi. (opusonewinery.com) (visitnapavalley.com) Napa Valley Grapegrowers is not a small trade club staging a niche dinner. The group says it was founded in 1975 and now represents more than 600 members, including growers, vineyard management companies, and related businesses tied to Napa’s vineyard economy. (napagrowers.org 1) (napagrowers.org 2) Last year’s event shows the scale. Napa Valley Grapegrowers said the 2025 Harvest STOMP raised more than $2.7 million, and those funds were split to support grower education programs and career and education programs for farmworker families. (napagrowers.org) (abc7news.com) That is why an August 22 save-the-date matters months in advance. In Napa, a single harvest-weekend event can pull in winery members, collectors, trade guests, and consumers at the exact moment the valley starts selling the romance of crush season. (harveststomp.com) (napagrowers.org) The 2026 page also says Michael Silacci will serve as honorary chair, linking the event even more tightly to Opus One’s leadership. For anyone packaging Napa trips, that gives the night a clear luxury anchor: Oakville, Opus One, harvest kickoff, and a cause tied directly to the people who grow the grapes. (harveststomp.com)