there are all kinds. running, biking, skiing, cannoing, score-o's (where there are a bunch or controls and you can visit them in any order and each is worth a different amount) photo-o's (where u get a photo of the control and u have to find where it is on the map and then go and visit it) and many others but i can't remember them.
and u should totally come out and try it sometime it is so much fun!! there is a junior web site
www.thewaterstop.org and u can find out what is going on there.