Helvetia Vineyards and Winery is located in the foothills of the Tualatin Mountains, the northernmost grape growing area in the Willamette Valley. The vineyards are located just above the Tualatin Valley floor between 450’ and 650’ elevation. Cascade and Helvetia soil types predominate. The Cascade soils consist of sedimentary soils deposited in the Valley by the Missoula Floods about 15,000 years ago. The Helvetia soil types consist of weathered soils deposited by the Cascade eruptions about 15 million years ago.