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Louis J. Sima Great Lakes Marsh Preserve

Located on the Galien River in New Buffalo, the Louis J. Sima Great Lakes Marsh contains approximately 150 acres of the larger Galien River Marsh, a Lake Michigan Coastal Marsh. Great Lakes Coastal Marshes are considered one of the richest habitats on earth and support high plant diversity.

The distribution of water in a coastal marsh is directly connected to and influenced by water levels of the Great Lakes. These coastal marshes are highly regarded for their diverse habitats, wildlife, and ecological value, but are threatened by the invasion of exotic species as well as habitat loss from development and water quality issues. Learn more about our restoration efforts throughout the Galien River Marsh.

Sima Marsh is dominated by emergent wetland plant species and provides an important habitat for birds, mammals, reptiles, and amphibians. Several rare state-listed threatened plant species are found here, and the Marsh is also host to other rare wildlife species.

One of the best ways to enjoy Sima Marsh is meandering through in a canoe or kayak. Access Sima Marsh at the Galien River boat launch on Red Arrow Highway, where kayak rentals are available, or at the New Buffalo City boat launch.