This one is not for the faint of heart! Located in Clinton, Montana, this naughty festival includes a competitive eating contest of, you guessed it, fried cow testies A.K.A prairie oysters. Of course, you can also try the crispy bull balls even if you’re not lining up to compete. Tip: there are plenty of—ahem—related non-food events as well, so this may not be the right event for families.