Slowtwich has a profile on the Cornwall Mutlisport Club here
I was born in Cornwall Ontario and got my start in triathlon in 1989 when the Cornwall Cycle Club held its first triathlon event. One of the members of the club, Donna Ryan, was on the age group national team and helped the club organize its first event, held in Long Sault. The distances were about 400m swim, 20km bike and 5km run (ish).
I was in Cornwall after a number of years last weekend. There is great riding around the Cornwall area, as well as many bike paths, and access to upper New York state and Lake Placid for hills. One of my favorite memories is doing the weekly 15km time trials during the summer.
There wasn't a multisport club in Cornwall when I got into the sport, but according to the Slowtwich article, the club has 275 members, awesome.