Tahquamenom Falls State Park encompasses 40,000 acres stretching over 13 miles. The Upper Falls is one of the largest waterfalls east of the Mississippi. It has a drop of nearly 50 feet and is more than 200 feet across with a maximum flow of more than 50,000 gallons of water per second. The Lower Falls are a series of five smaller falls cascading around an island. The Tahquamenon River rises from north of McMillian and drains the watershed of an area of more than 790 square miles. The amber color of the water is caused by tannin leached from the Cedar, Spruce and Hemlock in the swamps drained by the river. The extremely soft water churned by the falls causes the large amounts of foam which has been the trademark of the Tahquamenon since days of the voyagers.