Watch Ice Bridge - Mackinac Island’s Hidden Season for Free: How to Stream the Movie Online at 123Movies. . Mackinac Island, Michigan, is a tiny island in the center of the Great Lakes. Besides being a world favorite "Horse Drawn" and "Victorian Era" summer destination, the island holds another treasure few have ever seen: its wild, magical and beautiful winters. The 72-minute film Ice Bridge follows islanders' unique and quirky lifestyle throughout an entire year while tracing the formation of the spectacular phenomenon known as the "ice bridge" (a three-mile span of ice that allows islanders to cross to the mainland).