1950 Map of Tanacross

Traditional life and indigenous geography remain centered around the Tetlin Indian Reservation, with settlements at Tetlin, Tetlin Landing, and Mansfield Village. The topography is a complex system of bluffs and forks, where the Tanana River and Fortymile River networks provided historic travel routes before the advent of the highway system. A U S Customhouse near the Alaska Yukon boundary marks the critical transition between the United States and Canada during this era of northern development.