The Oak Knoll District became Napa Valley's most recent AVA. It can be found just north of the city of Napa and shares common boundaries with Mount Veeder to the west, Yountville to the north and Stags' Leap to the northeast. It is second only to Los Carneros as Napa's coolest AVA and has a fine, gravelly clay loam soil. Chardonnay is the dominant varietal, with Pinot Noir, Cabernet Sauvignon and Merlot sharing the remaining vineyard space.
United States → California → Napa County
American AVA
| Trefethen Oak Knoll Estate Cabernet Sauvignon 2001 | Oak Knoll District | Red | |
| Trefethen Harmony Chardonnay 2003 | Oak Knoll District | White | |
| Trefethen Oak Knoll Estate Merlot 2001 | Oak Knoll District | Red | |
| Trefethen Double T 2002 | Oak Knoll District | Red | |
| Trefethen Oak Knoll Estate Cabernet Franc 2002 | Oak Knoll District | Red | |
| Trefethen Oak Knoll Estate Chardonnay 2003 | Oak Knoll District | White | |
| Trefethen Estate Dry Riesling 2004 | Oak Knoll District | White | |
| Groth Chardonnay Napa Valley Oak Knoll District 2003 | Oak Knoll District | White |