Thx. I agree - tent peg seems a good guess, and I know travelers camped in this area in the mid-to-late 19th century. Maybe homemade, as I don’t find examples with an image search. A bag of these would be heavy though!
Or maybe a nail to sink down into the top of a fence post to hold barbed wire? Most of the other older iron I find here looks to be fence/farm stuff.