Located southwest of Oakland in Clinton County,[3] it sits in dense woodland on the side of a hill.

Although no detailed excavation has been conducted at Hillside Haven, all evidence found around points to the conclusion that it is a typical Adena mound, with both ceremonial and functional items within.

[4] In 1978, the Hillside Haven Mound was listed on the National Register of Historic Places because of its value as an archaeological site.

[1] As one of the last remaining Native American mounds in Clinton County, it is a rare survivor of Native American prehistory in the region, and its unusually good state of preservation only increases its significance.

[4] Contributing to its near-perfect condition is its location along a trail at a campground, which was formerly known as Hillside Haven.