If you're really tired, and that hill as you head back to the BC is just more than you can take, look for the walkway that goes under the bridge, instead of over it. Some days, especially if I've spent all day hiking around Epcot, that last hill is like Mount Everest. It's also handy if you are pushing a large stroller or a manual wheelchair. You can access it at either end before the hill. Just look for a sidewalk width walkway that appears to follow the water.