We stay at The Boardwalk most trips. From Test Track you walk into World Showcase and make a right. Right before you go over the bridge between UK and France make a right, go down the little path to exit the park through International Gateway then follow signs to The Boardwalk. If you walk at a brisk pace with the lack of crowds in World Showcase at that time of day I would say it will take between 10 and 15 minutes to walk it.