Ken from Vegas wrote:
It depends on what you want to do. If you choose to do the "Wildlife Discovery Tour" in Jasper, you'll probably want boots or at least high top shoes. On our walk we went "off trail" and some people who wore sneakers had a little problem (some wore sandals and had to stay behind!). The on-tour hikes are all level and on easy trails. However. if you want to do a little more hiking on your own (as we did), boots would be helpful. We walked to top of the mountain above the cable car in Jasper and were glad to have boots. Steep trail and loose gravel on that walk. We also walked to the tea house above Lake Louise. Steep trail and we got rained on, so we were glad to have waterproof shoes.