The Strait of Mackinac is the narrow waterway that connects Lake Huron to Lake Michigan.

The strait is located between Michigan’s Lower and Upper Peninsulas and is an important natural passage for water, ships, and wildlife. It connects the two lakes and plays a crucial role in the flow of water between them. The Mackinac Bridge, which spans the strait, is one of the most well-known landmarks in the region, linking Michigan's Upper and Lower Peninsulas. The Strait of Mackinac is a vital component of the Great Lakes water system.