World Triathlon

Montreal-Trudeau (YUL)
http://www.admtl.com/Passengers/Home.aspx

Shuttle

~$50 (being organized by LOC)

The closest hotels are
http://www.tourisme-memphremagog.com/en/lodging/hotel-et-spa-etoile-sur-le-lac/ (next to race venue)
and
http://www.tourisme-memphremagog.com/en/lodging/motel-champetre-le-fleur-de-lys/ (½km from race venue)

More hotels, motels and many B&B downtown Magog and surroundings
http://www.tourisme-memphremagog.com/en/lodging