Pets are allowed in Yellowstone National Park, but only in developed areas, and must remain within 100 feet of roads, parking areas, and campgrounds. Pets must be kept under physical control at all times – caged, crated, or on a leash not to exceed six feet in length. Pets are not allowed on trails or boardwalks, in the backcountry, or in thermal areas. Thermal areas pose particular hazards to pets. There are no exceptions to the regulations for carried pets (in arms, carriers, strollers, backpacks, and so forth) in restricted parts of the park. There are no kennels in Yellowstone but this service is available in surrounding communities.
More information on the Yellowstone National Park pet policy
