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Calgary Couple Fends Off Grizzly Bear on Troll Falls Trail, Prompting Alberta Parks Warning

Their video of the bear’s lunging behaviour led Alberta Parks to renew its warning urging hikers to carry bear spray

Howard Mah and Lori Arnason are shown in a recent supplied photo. The couple were recently pursued by a grizzly bear on a popular Kananaskis trail, west of Calgary. Supplied
A screenshot shows the heart-stopping moments when Howard Mah and Lori Arnason were followed by a grizzly bear while on a hike in Kananaskis country on July 19.
Lori Arnason and Howard Mah came face to face with a grizzly bear, seen in this handout image from video, while hiking through Troll Falls in Kananaskis, Alta., on Saturday, July 19, 2025. THE CANADIAN PRESS/Handout - Lori Arnason and Howard Mah (Mandatory Credit)

Overview

  • On July 22, Lori Arnason and Howard Mah were followed and lunged at by a grizzly on the popular Troll Falls Trail in Kananaskis Country
  • Without bear spray, the couple used intimidation tactics—raising their arms to appear larger and roaring loudly—to drive the animal away
  • They escaped unharmed and immediately warned other hikers at the trailhead before reporting the incident to Alberta Parks
  • Alberta Parks has maintained an active bear warning for the Troll Falls area and advises visitors to stay calm, back away slowly and never run when followed by a bear
  • Wildlife experts note that this season’s wet weather has boosted berry growth, increasing grizzly movements in high-traffic areas and reinforcing the need to follow Be Bear Smart protocols