The chaos unfolded on a busy highway about 16 miles (25 km) from Yellowstone's entrance. The authorities closed the road for several hours while emergency responders attended to victims and cleared the wreckage. Police have stated that the local coroner's office will announce the names of the deceased once their families have been informed. Yellowstone National Park, recognized as the nation's oldest park, spans nearly 3,500 square miles across Idaho, Wyoming, and Montana, attracting around four million visitors annually, with the bulk visiting during the summer months.