2018 Map of Detert Reservoir

About this map

The Palisades and Sugarloaf Mtn dominate the southern landscape of this 2018 survey, where the border of Lake and Napa Counties cuts across a complex network of canyons and peaks. The area around Oat Hill is marked by a legacy of mercury mining and early transportation, evidenced by the Oat Hill Mine Trail and the historic Old Lawley Toll Rd winding through the south-central hills. To the north, the terrain transitions into the Collayomi Valley and the waters of Detert Reservoir, which serves as a significant catchment in the drainage of Bucksnort Creek. The map details a rugged transition from the Mayacmas Mountains in the west toward the ranching and water resources of the interior valleys, including smaller bodies like Lake Bordeaux and springs such as Rattlesnake Spring.