White Bluffs AVA

White Bluffs AVA received its official designation on July 19, 2021, making it one of Washington's newer appellations. It sits within the broader Columbia Valley AVA on an elevated plateau roughly 200 feet above the surrounding Pasco Basin. The name comes directly from the distinctive whitish sedimentary layers visible in the cliffs above the Columbia River. Viticulture here dates back to 1972, when the first vines were planted at what are now known as Bacchus and Dionysus Vineyards, placing White Bluffs among the oldest wine-producing sites in Washington State.

• AVA officially designated July 19, 2021
• First vines planted in 1972 at Bacchus and Dionysus Vineyards
• Nested within the Columbia Valley AVA
• Named for whitish sedimentary cliff layers above the Columbia River

The soils of White Bluffs are defined by windblown silt, known as loess, sitting atop ancient lakebed sediment from the Ringold Formation. This Ringold Formation is a key differentiator: its higher clay content prevents vine roots from penetrating down to the basalt bedrock that underlies most of the Columbia Valley. That clay layer provides superior water retention in what is an extremely arid environment, receiving only 6 inches of annual precipitation. South-facing slopes and gently rolling terrain maximize sun exposure across the plateau.

• Loess (windblown silt) over Ringold Formation ancient lakebed sediment
• Higher clay content than most Columbia Valley sites, improving water retention
• Unique Ringold Formation prevents root access to basalt bedrock
• Only 6 inches of annual precipitation; clay soils are critical to vine survival

White Bluffs experiences a warm continental climate with significant diurnal temperature variation, a hallmark of quality wine production in eastern Washington. Elevation between 700 and 1,200 feet, with the majority of vineyards sitting between 800 and 1,000 feet, extends the growing season to 237.5 days. This is a full 45 days longer than the surrounding lower-elevation areas, allowing grapes additional time to develop complexity and balance acidity while accumulating sugars under intense summer sunshine.

• Warm continental climate with significant diurnal (day-night) temperature swings
• 237.5-day growing season, extended 45 days compared to surrounding areas
• Majority of vineyards sit between 800 and 1,000 feet elevation
• Elevation is the primary driver of the extended growing season

The AVA grows Cabernet Sauvignon, Merlot, Syrah, Riesling, and Sauvignon Blanc across 1,127 planted acres. Red wines from White Bluffs show dark fruit character with firm tannins and overall elegance. Whites are crisp with noticeable minerality. The combination of extended hang time, diurnal temperature swings, and clay-rich soils produces wines with balance and clear terroir expression. The scale of influence is significant: nearly one in every ten Washington wineries sources fruit from the White Bluffs AVA, and 92 wineries alone purchase from Sagemoor Vineyards.

• Key red varieties: Cabernet Sauvignon, Merlot, Syrah
• Key white varieties: Riesling, Sauvignon Blanc
• Reds show dark fruit and firm tannins; whites show crispness and minerality
• Nearly 1 in 10 Washington wineries source fruit from this AVA

White Bluffs is home to or draws from several well-regarded vineyard sites and producers. Sagemoor Vineyards is the most widely sourced, with 92 wineries purchasing its fruit. Other key names within the AVA include Claar Cellars, Bacchus Vineyard, Dionysus Vineyard, Gamache Vineyard, and Shaw Vineyards. Together, these 9 commercial vineyards and 1 winery represent 1,127 planted acres, the full extent of the AVA's current vine coverage.

• Sagemoor Vineyards supplies fruit to 92 Washington wineries
• Bacchus and Dionysus Vineyards hold the AVA's oldest vines, planted 1972
• 9 commercial vineyards and 1 winery currently operate within the AVA
• Claar Cellars, Gamache Vineyard, and Shaw Vineyards are additional key producers