
Ross Lake dominates the central corridor of this survey, where the Skagit River transitions into the impounded waters of the Ross Lake National Recreation Area. The map provides a detailed view of the water's edge at a spillway elevation of 1604 feet, noting distinct landforms like Tenmile Island and Little Jerusalem Island that emerge from the reservoir. To the west, the high peaks of North Cascades National Park harbor alpine features like Skymo Lake and Sourdough Lake, while the eastern shore is defined by the Pasayten Wilderness. Local history researchers can identify established backcountry infrastructure of the era, including the Gaging Station near Big Beaver Campground and the network of primitive routes such as the East Bank Pack Trail and Big Beaver Trail that connected these remote mountain basins.
35 named features on this map. Tap any name to fly to it.
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2 editions found
1920 · Slate Pass
USGS Topo · 1:125,000
1955 · Concrete
USGS Topo · 1:250,000
1958 · Concrete
USGS Topo · 1:250,000
1962 · Concrete
USGS Topo · 1:250,000
1963 · Crater Mountain
USGS Topo · 1:24,000
1963 · Diablo Dam
USGS Topo · 1:24,000
1963 · Ross Dam
USGS Topo · 1:24,000
1969 · Skagit Peak
USGS Topo · 1:24,000
1969 · Mt Prophet
USGS Topo · 1:24,000
1969 · Jack Mtn
USGS Topo · 1:24,000