Ranches in northwest Wyoming — and around the Mountain West — are turning to virtual fences to cut labor costs, prevent grazing overuse and get rid of barbed wire, which opens up migration corridors for elk or pronghorn. For Anson, preventing conflicts with grizzly bears is also a big motivator for using the new tracking technology.

In a heart-stopping tale of survival, Vince and Garrett Kalkowski, a father-son duo from Cody, Wyoming, narrowly escaped a charging grizzly during a hunting trip near Meeteetse. The younger Kalkowski’s quick thinking and a Glock 20 proved to be the difference between life and death. Here’s how it all unfolded.

The footage is extraordinary in that grizzly bears hibernate during the winter, when the Yukon receives most of its snow. So it’s rare to document a grizzly at close range during a blizzard and before it has shaken off the snow.