Grand Mound is a prehistoric burial site in Koochiching County, Minnesota, United States.
It is the largest surviving prehistoric structure in the upper Midwest, dating back to 200 BCE.
There are four other smaller earthworks at the site, closer in size to typical burial mounds around the Midwest.
[4] The mound is part of a larger series of interconnected archaeological sites that include seasonal camp locations and fishing areas.
[5] The site once had a visitor center operated by the Minnesota Historical Society, opened in 1975.