Slinde Mounds is a group of 16 conical mounds located on a terrace above the deep valley of the Upper Iowa River. They were built between A.D 300 and 1250 years ago by the Middle and Late Woodland cultures. Two habitation sites are associated with the mounds. Slinde Mounds is on the National Register of Historic Places. Vegetation on the site is dry hill prairie, dominated by short grasses usually found farther west.
Ordovician dolomite is exposed on the steep slopes.
There are no facilities for this preserve. The preserve is open to hunting as permitted by state and local regulations. See the Introduction for general use of state preserves.