The weather forecast for today predicted rain showers in the afternoon, so we went to Johnston Canyon in the morning. We drove from Lake Louise south toward Banff on the Bow Valley Parkway, a scenic two lane road that runs parallel to the Trans Canada Highway, with the Bow River running between the roads. A light rain began to fall just after we arrived at Johnston Canyon, but not heavy enough to stop us. Johnston Canyon is known for its waterfalls and they are beautiful, with the Upper Falls having the greatest drop. The water is the clearest imaginable. The other impressive thing about the canyon is the path. Much of it is cantilevered over the canyon.