2017 Map of Silica Mountain

About this map

The Calapooya Divide marks the high-elevation boundary between Lane and Douglas Counties, anchoring a landscape of dense drainage networks and sharp ridges. This section of the Umpqua National Forest is defined by the headwaters of several significant waterways, including Mosby Cr and its numerous forks, which flow northward toward the Row River. To the east, the terrain drops toward Sharps Cr and Walker Cr, areas long associated with Oregon's mining history. The map highlights the complex forest road system essential for managing these timberlands, such as Mosby Creek Rd and various Bureau of Land Management routes. Notable peaks like Silica Mountain, Holderman Mtn, and Snow Peak provide topographic context for the many springs and small tributaries, including Huckleberry Spring and Norwegian Cr, that feed the larger creek basins.