Found a pic of sack racing:
It's not really what I was wanting because I was hoping it was a game for children. However, all of the resources that I came up with mention that this is a man's game.
I'm not sure that my 6'2" husband has any interest in doing this, even for a cash prize. :0
I'm also not sure that I want to make sacks that are big enough for him to fit into.