2020 Map of Devils Slide

About this map

Snoqualmie National Forest dominates this mountain landscape in King County, characterized by a complex network of forest development roads and significant water management infrastructure. The South Fork Tolt Reservoir serves as a central feature, collecting alpine runoff via S Fork Tolt River and Deep Cr. The terrain is marked by steep elevation changes, most notably at Devils Slide and around various high-altitude bodies of water such as Lake Titicaca, Lynch Lake, and Black Lake. In the southern portion of the sheet, the North Fork Snoqualmie River flows past Fitchener Slough, illustrating the transition from steep timberland to the river valleys that support the region's broader hydraulic and logging history. Numerous forest service routes, including Tolt Reservoir Rd and N Fork Co Rd, provide insight into the access patterns used for resource management.