1971 Map of Philip Smith Mountains A-5

About this map

The Continental Divide snake-like path across the Brooks Range defines the hydrological and industrial landscape of this remote North Slope terrain. A significant engineering milestone is recorded here via purple revisions representing the Trans-Alaska Pipeline, which parallels the Dietrich River as it climbs toward the Atigun Pass. This corridor serves as the primary artery through the mountains, supported by a localized Camp, a Landing Strip, and a Tower positioned near the Chandalar Shelf. The map captures the transition from the southern-flowing waters of the Kuyuktuvuk Creek to the northern reaches of the Itkillik R. Remote mountain passes such as Oolah Pass highlight the traditional routes used to traverse these high ridges before the establishment of modern infrastructure.