The group higher up on the hill (next to the Nature Center) consists of Lynx and Conical, and called a Lynx Group (or Terminal
Moraine Group). While not subject to pedestrian traffic (well-defined path skirts the mounds), the mature trees growing on the body
of these mounds is of concern. Also, some brush and logs are scattered over the mounds. Interestingly, this group used to include
a Linear Mound almost two thousand feet east of the first two, near the campground. I don't know if that mound still survives.
You can read more about Devil's Lake Mounds at:
Don't forget to stop at the Nature Center, too - it has a wonderful exposition on local Mounds (see below).