Near this spot, a Native American fishing camp was used at various times between 3,000 and 600 years ago during the Woodland Period. Pottery from the camp indicates repeated occupation, and the inhabitants preserved harvested fish for future use by drying and smoking them or boiled them to obtain fish oil used to treat and soften hides. A broken Blackduck fish pot containing a layer of preserved fish bone shows that they caught white sucker and northern pike/muskellunge, fish that are still plentiful in the Turtle River and Three Island Lake. Archaeologists also discovered artifacts including fish vertebrae, a Woodland Period arrowhead, and tips for fishing spears carved from bone.