2015 Map of Mount Lyell

About this map

The high crest of the Sierra Nevada takes center stage in this 2015 study, marking the convergence of Yosemite National Park, Inyo Nat For, and the Sierra National Forest. This high-altitude landscape is dominated by the peaks of the Cathedral Range, including the towering Mount Lyell and nearby Mt Maclure, which harbor the receding Lyell Glacier and Maclure Glacier. The map serves as a vital record of the headwaters of the Merced River, showing the intricate drainage system where the Lyell Fork Merced River and Red Peak Fork begin their descent. High mountain passes such as Isberg Pass and Post Peak Pass illustrate the historical transit routes through this challenging terrain. Geologic landmarks like Cony Crags and alpine water bodies such as Florence Lake and McClure Lake further characterize this protected wilderness at the intersection of Madera, Tuolumne, Mono, and Mariposa counties.