Diamond Creek, Napa Valley Cabernet Sauvignon Red Rock Terrace 2018

Winery Background and History

Established in 1968 by Al and Adelle “Boots” Brounstein, Diamond Creek Vineyards is a pioneering Napa Valley estate renowned for its dedication to single-vineyard Cabernet Sauvignon. Situated on Diamond Mountain, the estate comprises distinct vineyard blocks—Volcanic Hill, Red Rock Terrace, Gravelly Meadow, and the rare Lake Vineyard—each showcasing unique terroirs. In 2020, the estate was acquired by Maison Louis Roederer, a French Champagne house, which has since implemented vineyard and cellar enhancements to honor the winery’s legacy while refining its classic style.

Producer and Winemaker

Under Roederer’s ownership, Graham Wehmeier became only the third winemaker in Diamond Creek’s history. Wehmeier’s approach emphasizes earlier harvesting, reduced oak influence, and gentler extraction techniques to produce wines that reflect the estate’s original vision of elegance and terroir expression.

Vineyards and Micro Climate

The Red Rock Terrace vineyard spans approximately seven acres on north-facing, steeply terraced slopes composed of iron-rich, red rocky soils. This unique microclimate benefits from less direct sunlight, contributing to the vineyard’s reputation for producing Cabernet Sauvignon with velvety tannins, dark cherry and black currant flavors, and notes of tea, iron, and savory dried herbs. 

Vinification & Aging Methods

The 2018 vintage underwent fermentation with a focus on preserving fruit purity and terroir expression. Aging occurred in French oak barrels, with a balanced use of new and neutral oak to enhance complexity without overshadowing the wine’s inherent qualities.

Tasting Notes

The 2018 Red Rock Terrace Cabernet Sauvignon exhibits a deep ruby color and presents an enticing bouquet of black cherries, cassis, and subtle hints of cedar. On the palate, it delivers a luxurious experience with rich black fruit flavors, integrated oak, and velvety tannins, culminating in a long, rhythmic finish. 

Food & Wine Pairing

This Cabernet Sauvignon pairs exceptionally well with robust dishes such as grilled ribeye steak, braised short ribs, or lamb shanks. Its rich and complex profile complements the savory and umami flavors found in these meats. Additionally, the wine’s acidity and tannic structure make it a suitable companion for hearty stews, aged cheeses, and dishes featuring earthy ingredients like mushrooms or truffles.

Service Methods and Temperatures

To fully appreciate the nuances of the 2018 Red Rock Terrace Cabernet Sauvignon, it is recommended to serve the wine at a temperature of 60–65°F (15–18°C). Decanting the wine for at least an hour prior to serving can help to open up its aromatic profile and soften the tannins, enhancing the overall tasting experience. Using large, bowl-shaped glasses will also allow the wine’s aromas to concentrate, providing a more immersive sensory experience.

Storage and Aging Potential

The 2018 Red Rock Terrace Cabernet Sauvignon possesses the structure and balance to age gracefully over the next 15–20 years. Proper cellaring conditions—consistent temperature around 55°F (13°C), appropriate humidity levels, and protection from light and vibration—will ensure the wine develops additional complexity and depth over time. Collectors and enthusiasts can expect the wine to evolve, revealing tertiary notes that add to its allure.

Grape Varietals & Percentage Used

78% Cabernet Sauvignon

13% Merlot

4.5% Malbec

4.5% Petit Verdot 

ABV (Alcohol by Volume)

14.5%

Scores

• Wine Enthusiast: 96

• Wine Spectator: 94

• Wine Advocate: 98

• James Suckling: 96

• Wine & Spirits Magazine: 95

• Vinous: 96