2017 Map of Prairie Reef

About this map

Prairie Reef stands as a prominent landmark in this high-altitude wilderness, marking the divide within the Lewis & Clark National Forest. The landscape is defined by the complex drainage systems of the Sun River and Ahorn Creek, where the West Fork South Fork Sun River and Lost Fork Ahorn Cr carve deep through the mountain terrain. This 2017 survey details a primitive and roadless area where the border between Lewis and Clark and Powell counties follows the high ridges of the Continental Divide, separating the Lewis & Clark from the Flathead National Forest. Significant summits like Red Butte and Junction Mtn overlook a network of seasonal watercourses, including Black Bear Cr, White Bear Cr, and Grizzly Gulch, illustrating the hydrological importance of this protected backcountry region.