1970 Map of Pentagon Mountain

About this map

The Bob Marshall Wilderness defines this high-elevation landscape, where the Continental Divide weaves between Pentagon Mountain and Table Mountain. This 1970 field-checked survey reveals the complex drainages of the Flathead National Forest and the Lewis and Clark National Forest, marked by the headwaters of the Mid Fk Flathead R and the South Fork Sun River. The terrain is characterized by a network of pack trails connecting significant landmarks like Switchback Pass and the remote waters of Dean Lake and Lake Levale. Within the Sun River Game Preserve, named peaks such as Signal Mountain and Moonlight Peak stand as prominent features of the Front Range. The map effectively documents the administrative boundary between Flathead Co and Lewis and Clark Co as it follows the high ridges of the divide.