gored

Bison are unpredictable and can run three times faster than humans.

According to the National Park Service, a 25-year-old female from Ohio was gored by a bison after being within 10 feet of the animal.

A distance of at least 100 yards should be maintained from all bears and wolves.

Park officials emphasize that animals in Yellowstone are wild and unpredictable, no matter how calm they may seem.