Bear attacks in Yellowstone are rare. But they do happen.

One very lucky camper was attacked in Soda Butte Campground in 2008 on an early July morning while asleep in his tent. Not that he was lucky to have been attacked, he was lucky that he suffered only bite and claw marks while protecting himself. 
 
 
After the attack, the U.S. Forest Service evacuated and closed the campground as well as a nearby Chief Joseph campground – a few miles from the northeast entrance to the park.

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