The nearest airport is Pierre Trudeau airport in Montréal, which is served by most major airlines.
Unfortunately there is no viable public transport between Montréal and Mont Tremblant. We are arranging bus transfers from Pierre Trudeau airport on the afternoons and evenings of Sat./Sun., 20/21 July, with return trips early mornings of Fri./Sat, 26-27 July. Please fill out the survey to help us maximize the efficacy of these bus trips. Please note that this is not a regularly scheduled service, and are only possible through the generosity of our sponsors. The bus schedule will be posted soon.
Car rental is also a good option (note; parking is not included in registration or hotel fees).
If you can offer to drive people to/from Montréal please leave a comment in the Ride/Room Share Discussion.