Found 4 places
Latitude: 43.9857 (43°59′8″N), Longitude: -96.3053 (96°18′19″W)
Latitude: 43.9999 (43°59′0″N), Longitude: -96.3173 (96°19′2″W)
Latitude: 43.9886 (43°59′19″N), Longitude: -96.3038 (96°18′14″W)
Site: pipestonecc.com
Latitude: 44.0207 (44°1′15″N), Longitude: -96.3198 (96°19′11″W)
Site: nps.gov/nr/travel/pipestone/sup.htm