2023 Map of Ross Dam

About this map

Ross Lake and Diablo Lake anchor this high-altitude landscape within the North Cascades National Park and the Ross Lake National Recreation Area. The geography is defined by steep relief, stretching from the water's edge to the ice-carved heights of Colonial Peak and Ruby Mtn. Trace the historical footprint of early mountain access via the Happy Creek Mill Trl and the Sourdough Trl, which navigate the terrain surrounding Sourdough Mtn. The persistence of the Neve Glacier above Neve Creek provides a significant indicator of the region's glaciated character. Unique local naming is evident at Buster Brown Flats and John Pierce Waterfall, while the rugged transit through the range is marked by the Fourth of July Pass. The network of water bodies, including Thunder Lake and Pyramid Lake, underscores the complex drainage patterns feeding the primary reservoirs.