From
https://en.wikipedia.org/wiki/Potato_race:
Mounted events were particularly prevalent in the Southwestern United States. Individual mounted events usually consisted
of individuals competing to be the fastest at collecting potatoes along a structured course. Team-based events had no defined
course, and were notable for their violence. Players were permitted almost every possible tactic for interfering with the
opposing team, including dragging other riders off their horses.
Potato races, both on-foot and mounted, are occasionally still held at local gatherings or riding competitions today,
although the violent mounted version has died out.