Mont-Tremblant is about 140 km north of Montréal — roughly 90 minutes to two hours by car on Highway 15 (Autoroute des Laurentides) north to Saint-Jérôme, then Highway 117. Parking at the resort is abundant but expensive in peak season.
There is no direct train service. In ski season, weekend bus services run from Montréal (Terminus Voyageur) operated by various companies; check schedules as they change seasonally. A shuttle service runs from Montréal-Pierre Elliott Trudeau International Airport (YUL) throughout the year, which is more convenient than car rental if you're arriving by air. Taxis from the town of Mont-Tremblant to the resort cost around $20–30.