Portage is a former settlement on Turnagain Arm in Alaska, about 47 miles (76 km) south of Anchorage. The town was destroyed almost entirely in the 1964 Good Friday Earthquake when the ground in the area sank about six feet, putting most of it below sea level. All that remains today are the ruins of a few buildings and a "ghost forest" of trees that died after salt water inundated their root systems. Where there was once a town there is now only a railroad and road junction linking the Seward Highway and the Alaska Railroad to Portage Glacier park and the Anton Anderson Memorial Tunnel, which leads to Whittier.
- U.S. Geological Survey Geographic Names Information System: Portage (Anchorage)
- The Milepost, 59th edition, page 540 ISBN#9-781892-15421
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