2017 Map of Ross Dam

About this map

Ross Dam anchors this high-elevation landscape, where the waters of Ross Lake meet the Ruby Arm in a dramatic hydro-engineering feat. The survey documents the confluence of the North Cascades National Park and the Ross Lake National Recreation Area, mapping a wilderness where human infrastructure is limited to critical corridors like Diablo Dam Rd and the Pacific NW National Scenic Trail. Named peaks such as Sourdough Mtn and Ruby Mtn loom over the drainage basins of Thunder Creek and Stetattle Creek. Notable terrain features like Butler Brown Flats and the Panther Potholes provide specific landmarks for those navigating the transition from Diablo Lake to the higher passes, including Fourth of July Pass and Hidden Hand Pass.