Calvin Barrett of Colorado was driving along the Beartooth Highway when he came across a mother grizzly bear and her cubs.
He posted video of the encounter on Instagram and wrote: "Slowed down to check out some bears on the way into Montana. Kinda goes without saying but, friendly reminder: don’t f*** with mama bears, or any mamas for that matter. For future reference I’ve been informed that the way we approached the bears, slowing down, and invading their space is not safe nor respectful wildlife viewing practice. So if you find yourself in this situation be sure to stay back and give any wildlife a chance to move out of sight before moving forward."