| less than one acre|
6 August 1993
| Prehistoric Rock Art of South Dakota MPS|Archeological Site No. 39HE331 Wikipedia
39HE331 is an archaeological rock art site in Hyde County, South Dakota. The art is located on a flat boulder in a field overlooking an intermittent stream near the community of Holabird. The art consists of pecked geometric shapes, including a series of "turkey track" designs, two circles with rays extending from one half, a horseshoe shape, and a plain circle. One of the turkey tracks has an X through it and is surrounded by a circle. The meaning of these symbols is not known, as they do not resemble other rock art in the region. Glacial striations in the boulder surface may also be confused for pecking.
The site was listed on the National Register of Historic Places in 1993, for its potential to yield information about prehistoric Native American movement patterns.