Designated: 2016
Total vineyard acreage: 100 (40 Hectares); Washington acreage: 9 (4 Hectares)
Top Varieties: Chardonnay, Pinot Noir, Merlot
Average Annual Precipitation: 11-22 inches

Lewis-Clark Valley is nicknamed the “banana belt” because of its temperate climate amid colder surrounding regions. This climate produces high quality tree fruit, such as peaches and apples, as well as exceptional wine and table grapes.

The appellation is directly below originating watersheds of the Palouse and Camas Prairies. The steep V-shaped valley allows for good drainage, providing frost protection and cool nighttime temperatures for acid retention and flavor development. Annual precipitation varies between 11-22 inches, enough that minimal irrigation is needed. 

Lewis-Clark Valley AVA’s soils are comprised of decomposing perennial grasses and grass roots with capacity to hold water. The majority of soils contain loess, or wind-deposited, nutrient-rich silt. The region has good planting areas that are easy to develop and contain air drainage characteristics that are ideal for wine grapes.

Map of Washington with the Lewis-Clark Valley AVA in red, surrounded by the rest of the AVAs in muted greens and oranges.

The appellation straddles the Washington-Idaho border and is bisected by the Snake and Clearwater rivers. It is nestled in the mountainous backbone of northern Idaho, the Bitterroot Mountains.

72% of the total acreage is in Idaho. 28% is in Washington. Of note, it is one of two eastern Washington appellations located outside the Columbia Valley, abutting that appellation’s south-eastern edge. 

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