1950 Map of Healy A-4

About this map

Caribou Pass serves as a critical high-elevation transition point in this remote Alaskan wilderness within the Matanuska-Susitna Borough. Photogrammetric methods from 1949 aerial surveys reveal a landscape defined by complex drainage systems where the headwaters of the Jack River and South Creek flow through deeply incised valleys. The map illustrates the convergence of multiple watersheds, most notably where the East Fork Chulitna River and Tsusena Creek carve through the terrain. These waterways reflect the natural travel corridors used before formal roads reached the interior. The presence of Portage Creek further highlights the historical transit patterns of a region still largely unsurveyed and unmarked on the ground at the time of the 1950 field annotation.