2015 Map of Monticello Dam

About this map

Monticello Dam stands as the centerpiece of this terrain, anchoring the southeastern reach of Lake Berryessa at the borders of Napa, Yolo, and Solano counties. The landscape transitions sharply from the rugged elevations of the Vaca Mountains and Blue Ridge into the flat expanses of the Sacramento Valley. Water is the defining element of the region, where Putah Creek flows eastward from the dam toward the town of Winters. Higher in the ridges, numerous named sources like Buckhorn Spring and Grapevine Spring feed the complex drainage system of Chickahominy Slough and Enos Cr. This map documents a high-relief environment where steep canyons such as Cold Canyon and Thompson Canyon meet the agricultural edge of the valley, traced by rural routes like El Camino and Sackett Ln.