2018 Map of Larkspur Hills

About this map

Surprise Valley defines the western edge of this Modoc County landscape, where the waters of Upper Lake meet the rising slopes of the Larkspur Hills. This 2018 survey reveals a terrain shaped by seasonal water management and natural drainage, with Fee Reservoir and Little Mud Lake positioned as significant catchments between the high ridges and the valley floor. The geography is deeply etched by numerous canyons and seasonal waterways, including Poison Springs Canyon and Lieberman Canyon, which channel runoff from the hills down toward the arid basins.