There’s no question that Washington’s hottest AVA—as in degree days—is also its hottest—as in fastest growing. That’s Red Mountain, a 4,040-acre speck within the vast, 11-million-acre Columbia Valley AVA. Jim Holmes and John Williams planted what’s now known as Ciel du Cheval Vineyard back in 1975, followed by Klipsun, planted by David and Patricia Gelles