Potter Marsh Bird Sanctuary is a 564 acre fresh water marsh, located at the southern end of the Anchorage Coastal Wildlife Refuge.
The marsh was created in 1917 when the embankment for the Alaska Railroad was built up, effectively separating the fresh water from the Chugach Mountains, and the salt water from Turnagain Arm.
Potter Marsh is often called the most accessible wildlife viewing location in Alaska. The marsh is easily reached by the Seward Highway, and it contains a 1550 foot long boardwalk to keep your feet dry.
This wetland maze sees roughly 130 species of migratory and nesting birds calling it home, for at least part of the year. Moose, beavers, muskrats, eagles and hawks all can be viewed at Potter Marsh. Spawning salmon are often seen swimming up Rabbit Creek from Turnagain Arm in season.
Both brown bear and black bear use the marsh, but they are very rarely seen here. Consider yourself very lucky if you spot a bruin moving through the wetland.
Turnagain Arm, near Anchorage, has some of the largest tidal differentials in the world. The tidal bore can be quite the sight to see, especially if the belugas are surfing their way in with the tide.
The photo was taken on 2 May 1906, when the SS Toledo was left high and dry by a low tide in Turnagain Arm. The steamer was probably coming back from the gold camps at the southern end of the arm, when it was caught by the escaping tide.
Fascinating photograph, which comes from the Alaska State Library collection.
Turnagain Arm, south of Anchorage, received its name from one William Bligh, who was serving under Captain James Cook, during his search for the Northwest Passage. Bligh was sent out with a party to explore the two arms of what is now Cook Inlet. Both arms of the inlet led to rivers, and not the famed Northwest Passage, and Bligh testily named the final arm Turn-Again, because they had to turn around for a second time. It’s no wonder his crew would eventually mutiny.
At low tide, Turnagain Arm becomes a large mud flat. The tides here are the largest in the United States, coming in at 40 feet. The arm is also known for its tidal bores, which can be as high as six feet, which is an impressive sight, as it rushes across the arm. Beluga whales often surf the bore as it comes in.