The Banff Marathon last weekend was pretty spectacular, and that's despite a change of course having received the following message from Parks Canada just the day before: "Staff had to temporarily close the Vermilion Lakes Road to the public last night due to the presence of two competing male grizzly bears that were both dominating the roadway and preventing safe passage by visitors. Both animals are in the height of breeding season and actively searching for females. One of them also travelled the length of the road yesterday, not yielding to people. Although both are ear-tagged, neither of these large males (500-600 lb range) are id radio-collared, so we are unable to monitor their whereabouts other than through visual observations. There is also another very large unmarked grizzly bear in the immediate area that appears more reclusive, but has been popping up in surprising places over the last week. Recent events in Jasper underscore the unpredictable nature of large...