Human recreation on mountain trails is displacing grizzly bears and wolves from their natural habitats, even when the trails are hundreds of metres away, according to a new study from the University of Alberta. The research underscores the need for more effective planning to ensure that recreationists and wildlife can coexist, particularly in the busy Bow River Valley, which has long served as a natural corridor connecting the prairies to the Continental Divide… Though trails that never receive any use from humans have little to no effect on wildlife, only half of grizzlies studied would venture within 300 metres of trails with the highest human use. This effect was more pronounced in wary wolves, whose radius of comfort extended to 600 metres from the busiest trails. “We initially thought bears might use hiking trails as efficient routes when humans weren’t around, but they actually avoid these areas altogether,” says the author.