It looks more like a big spike nail than a hitch pin to me. Hitch pins typically had less of a point and more of a "head" so it wouldn't fall through the hole in the hitch. But agree a size reference would help. Weird that the point looks pretty sharp in one view, but rounded on the other.
I have found many over the years in fields.
Granted they're no as sharp looking as this one, but they're survey pins.
In field locations the pins are moved around from plowing etc...