I'm trying to guess without googling but am coming up empty...
Peterborough, though there are 3 that I know of in Southern Ontario. Officially IM 70.3 though! I have done Muskoka before and Welland was new in 2010.
Ah. Great to have a goal to help structure your training!
Long term I may be pointing towards another Ironman in 2014 with a friend who turns 70 that year. This is just the easy start to that training with a slow build up as health is more of a factor with age.
Sigh, yes, I've noticed. :) Cool! That sounds like a fun plan. Are you thinking of any particular IM or is it too early?
New York, new this year, a nice flat course and becomes the US Champs this year replacing Lake Placid. Personally I enjoyed the 3,000 feet climb at LP but flat works better for my training partners.