Access to Tetlin National Refuge Center The Tetlin, Alaska Refuge is visited by thousands of migratory birds each spring and fall. The Wildlife Refuge encompases approximately 730,000 acres. Tetlin National Wildlife Refuge is made up of forests, wetlands, tundra, lakes, mountains and glacial rivers. bounded by the Alaska Range. The northern boundary of Tetlin Refuge extends 65 miles along the Alaska Highway. Foot access to the northern portion of the refuge is available along the Alaska Highway