YELLOWSTONE NATIONAL PARK, Montana - Tourists in Yellowstone National Park got a little too close to a mama bear's cubs and ended up running for safety.
A black bear chased onlookers after they surrounded three cubs on a road in the Montana section of the park last week.
People ran as the mother bear zigzaged across the road and visitors scrambled to get into their cars.
Rangers say the cubs were about thirteen months old so the mother was not as protective as she would have been with new cubs.
The incident is a reminder that "Wildlife Can Be Unpredictable," Montana Fish, Wildlife & Parks wrote in a Facebook post.
The park requires visitors to "stay at least one hundred yards away from bears."