Turnagain Arm is a dramatic 40-45 mile long saltwater fjord branching northeast from Cook Inlet, forming the northern boundary of the Kenai Peninsula. It is renowned for its extreme tidal range, among the largest in the United States, with tides reaching up to 40 feet. These massive tides create a powerful bore tide wave and expose vast, dangerous mudflats at low water. The arm is characterized by opaque, silt-laden water due to heavy glacial silt loads from river systems, making it largely undesirable for resident marine species. The Seward Highway runs parallel to its southern shore, providing stunning scenic access through the Chugach Mountains. The primary angling focus here is on migratory salmon entering the freshwater streams at the head of the arm, rather than on traditional saltwater fishing within the arm itself.