self-supported ironman?

I'm wondering, pondering, what to do next. I am solid in my decision not to participate in another IM branded race, but I do like the idea of pushing myself to new limits. I was poking around on twitter and found zentri.com. this dude did/does a self-supported ironman from his home in texas which got me thinking of doing a similar thing.

I don't know about you, but I for one, have thought that the Gatineau Park is a PRIME locale for an iron distance event: Meech swim, lots of bike loops, and a few run loops.

Something to consider.

I'm also toying with the idea of an ultramarathon; perhaps the Haliburton 100.