New Details Released in Fatal Glacier National Park Grizzly AttackYou may remember back in May when we told you about the missing hiker who was attacked and killed by a grizzly bear in Glacier National Park. Investigators Say Glacier Bear Attack Was Not PredatoryAccording to newly released incident reports, Pollio was hiking the Mount Brown Lookout Trail near dusk when he apparently surprised an adult male grizzly bear. The report says Pollio was able to empty his entire can of bear spray, but investigators couldn't determine if the spray actually reached the bear. Michael Smith, Getty Images Michael Smith, Getty ImagesHow To Stay Safe While Hiking In Montana Bear CountryThat second attack turned the encounter fatal. Top 7 Places with Highest Risk of Bear Encounters in Montana It's important to note that while certain areas have higher bear populations, bears are wild animals with unpredictable behaviors.