Be sure to break the unofficial record of 94km
We've been having this sort of event 3 years in a row now. The emphasis has been "fun for everyone", I'm sure that breaking 94km will be pretty easy if you're taking it even half seriously. But it's really fun - I highly recommend it and wish you good luck! I think this kind of event is really great for generating a little bit interest and for for example big potential as charity events etc...
:: SUNKEN LOGS Freediving (in finnish only, but you get the picture)