Grizzly Mauls and Kills Backcountry Guide Near YellowstoneHighway 191 runs through some prime fishing Montana fishing country, passing Gallatin Gateway, Big Sky, and through a narrow canyon before opening into wide country just west of Yellowstone. Last week, Charles W. Mock IV, 40, an experienced backcountry guide was killed by a grizzly bear, likely protecting a cached moose carcass, not far from 191, near Baker’s Hole campground. Mock lived in West Yellowstone, knew the area well, and was carrying bear spray. 6-foot stands of brush line the Gallatin in many places, it would be very easy to spook a bear there. The mayor of West Yellowstone, Jerry Johnson, who owned the guide service Mock was employed by, said Mock was a very experienced outdoorsman.