The main burial mound measures 140 feet (43 m) in length and 100 feet (30 m) in width, about 25 feet (7.6 m) high, plus a 200 feet (61 m) tail measuring 12 feet (3.7 m) in width and 3 feet (0.91 m) in height. There are four other smaller earthworks at the site, closer in size to typical burial mounds around the Midwest. Besides the mound, the site contains a number of stratified deposits from villages dating to the Middle Woodland and Late Woodland periods.
The site once had a visitor center operated by the Minnesota Historical Society, opened in 1975. The visitor center was closed in 2003 and the site was closed to the public in 2007, amid concerns that having tourists viewing burial sites was inappropriate. Bill Keyes, the head of the Historical Society's historic sites and museums division, said, "What we heard from tribal elders was that this was like a cemetery, it was a burial ground, and that operating it as a tourist attraction was really not an appropriate way to go."