The boat between Epcot and MGM takes about 25-30 minutes and stops at Boardwalk, Yacht/Beach Club and the Swan and Dolphin. There is also a walking path that is faster, if you're up for it. Alternatively, you can walk part of the distance and catch the boat at any of the three stops if you get tired. The dock at Epcot is outside the International Gateway between England and France. The dock at MGM is to the far left as you exit the Studios.