2023 Map of Diablo Dam

About this map

Skagit River hydro-electric infrastructure dominates this mountainous landscape in the 2020s, anchoring the company towns of Newhalem and Diablo. The corridor is defined by a series of impoundments including Gorge Lake and Diablo Lake, which facilitate power generation for the region. Beyond the industrial footprint at Reflector Bar, the map details a high-elevation wilderness protected within North Cascades National Park and the Stephen Mather Wilderness. Permanent ice features like Colonial Glacier and Neve Glacier sit among the summits of Pyramid Peak and Pinnacle Peak. Topography is characterized by significant relief, where Gorge Creek Falls and Ladder Creek Falls drop steeply toward the river valley. Numerous recreation routes, such as the Sourdough Trl and Newhalem Creek Trl, provide access to the surrounding peaks.