2017 Map of Mount Jefferson

About this map

The Continental Divide carves through this high-altitude landscape on the Montana-Idaho border, separating the Centennial Valley from the upper reaches of the Snake River drainage. In the north, the Red Rock Lakes National Wildlife Refuge encompasses the Alaska Basin and Red Rock Cr, providing a sanctuary for wildlife beneath the towering Centennial Mountains. To the south, the land rises into the Targhee National Forest and Beaverhead National Forest, where peaks like Nemesis Mtn and the massive Mount Jefferson dominate the horizon. Historical transit through these mountains is marked by Red Rock Pass and Snoo-weh Pass, providing passage between the high valleys. The complex drainage network, including Hell Roaring Cr and Tin Cup Cr, illustrates the heavy snowmelt patterns typical of the Eastern Centennial Mountains.