There is an an annual bike race held in our area called the Tour de Donut. Eating donuts isn't mandatory but you get 5 minutes off your time for every donut you eat at each of the two mandatory stops. It is always held during the week of the Tour de France and it is usually hot and humid. Needless to say, I have seen many donuts going down and coming back up!

Trek, I bet you've heard of this race.