I had a work trip to Banff a few years ago, loads of people telling me, you wont see any bears, etc.
Within 3 days I'd stumbled into a family of Grizzlies, Mum & 2 Cubs on the path up the the Tea Houses near Lake Louise. Got within 20 yards of Mum & had to get the Bear Spray out... fortunately she & the cubs wandered off down the hill so we escaped... It was a serious incident, Bear stood up in front of us while we backed away, must have been 8 or 9 feet tall, so close I could smell the thing.
Next day, got stalked by a Black Bear on a walk near Lake Minnewanka (Phnar, Phnar)...
On the last evening went for a nice gentle evening walk up the Tunnel Mountain trail in Banff, and came face to face with a Mountain Lion, about as big as a Labrador but a bloody sight more Bitey.
Mental
In summary... Bears...