Les Collines Vineyard occupies approximately 290 acres in the foothills of the Blue Mountains, 5 miles southeast of Walla Walla, Washington. The center of the vineyard is located near 46.004°N, 118.274°W. The southern boundary of the vineyard coincides with the border between Washington and Oregon. The vineyard lies within the Columbia Valley and Walla Walla Valley American Viticultural Areas (AVAs) and is situated on a broad, generally west-sloping ridge of low-relief bounded by the drainages of Cottonwood Creek on the north and a small unnamed ephemeral stream to the south. The slope of the vineyard increases gradually from 1.5° on the west to 6° on the east, as the Blue Mountains are approached. The elevation ranges from 1140 feet in the northwest corner of the vineyard to 1370 feet in the southeast corner.