We receive many questions regarding pets in Yellowstone. In order to protect the Park as well as Park visitors and their pets, the presence of pets in Yellowstone is tightly controlled. Yellowstone National Park is a designated natural area where wildlife are free to roam undisturbed. Park visitors should be able to enjoy native wildlife in their natural environment without the disruption of other people's pets. For this reason, pets are prohibited in the backcountry and on trails and boardwalks.
Pets occasionally escape from their owners.
Domestic animals generally lack the ability to survive in the wild. A loose dog can lead a bear directly back to you. There is a strong possibility that your pet could become prey for a bear, coyote, owl, or other predator. There is a possibility of exchange of diseases between domestic animals and wildlife. Thermal areas pose particular hazards to pets.