Humbug Marsh, a 1.88 square kilometre (0.725872058153966 sq mi) wetland

Wetland

A wetland is an area of land whose soil is saturated with water either permanently or seasonally. Wetlands are categorised by their characteristic vegetation, which is adapted to these unique soil conditions....

 in southeastern Wayne County, Michigan

Wayne County, Michigan

-History:Wayne County was one of the first counties formed when the Northwest Territory was organized. It was named for the American general "Mad Anthony" Wayne. It originally encompassed the entire area of the Lower Peninsula of Michigan, as well as small sections that are now part of northern...

, is a constituent element of the Detroit River International Wildlife Refuge

Detroit River International Wildlife Refuge

The Detroit River International Wildlife Refuge is the only international wildlife refuge in North America. It was established in 2001 and is managed jointly by the United States Fish and Wildlife Service and the Canadian Wildlife Service. The refuge is located along the western coast of Lake...

. It is listed as a wetland of international importance.

Although Humbug Marsh is located within heavily-populated Metro Detroit

Metro Detroit

The Detroit metropolitan area, often referred to as Metro Detroit, is the metropolitan area located in Southeast Michigan centered on the city of Detroit which shares an international border with Windsor, Ontario. The Detroit metropolitan area is the second largest U.S. metropolitan area...

, it is acclaimed as a high-quality remannt of the wetlands that once lined both sides of the international Detroit River

Detroit River

The Detroit River is a strait in the Great Lakes system. The name comes from the French Rivière du Détroit, which translates literally as "River of the Strait". The Detroit River has served an important role in the history of Detroit and is one of the busiest waterways in the world. The river...

. This slow-flowing river was a hotspot of biological diversity, particularly as a location for fish spawning

Spawn (biology)

Spawn refers to the eggs and sperm released or deposited, usually into water, by aquatic animals. As a verb, spawn refers to the process of releasing the eggs and sperm, also called spawning...

. The remnant marsh is classified as a place of "importance to threatened, endangered, and vulnerable species

Endangered species

An endangered species is a population of organisms which is at risk of becoming extinct because it is either few in numbers, or threatened by changing environmental or predation parameters...

 and ecological communities."

Humbug Marsh is located on the shoreline of the Detroit River, straddling the boundary line between Gibraltar

Gibraltar, Michigan

Gibraltar is a city in Wayne County in the U.S. state of Michigan. The population was 4,656 at the 2010 census. It is located on the Detroit River directly south of, and adjacent to, Trenton.-Geography:...

 and Trenton

Trenton, Michigan

Trenton is a small city in Wayne County in the southeast portion of the U.S. state of Michigan. As of the 2010 census, the city population was 18,853...

 in southeastern Wayne County, Michigan

Wayne County, Michigan

-History:Wayne County was one of the first counties formed when the Northwest Territory was organized. It was named for the American general "Mad Anthony" Wayne. It originally encompassed the entire area of the Lower Peninsula of Michigan, as well as small sections that are now part of northern...

. A small overshore river island (Hamburg Island) is included within the official boundaries of the Marsh.

The Humbug Marsh parking lot is located at 5437 West Jefferson Avenue, Trenton, Michigan.