Looks like fun! (and Steve wins the clever comment competition!)
I've been to see those (near Warwick, NY). I ran motorcycle enduro for over 10 years and a lot of those guys would do that in the Winter.
There is a NY Ice Racing organization (for cars). I've always been tempted, but I don't do that sort of cold real well.
I was watching the guys ice fishing on our lake yesterday from the safety of my warm car and I was still shivering.