Friday morning, April 18, was the annual spring opening of Yellowstone National Park in northwestern Wyoming, allowing access to visitors for select roads and park entrances. Over the next month ...

Yellowstone winter keeper Steven Fuller with his horse, Ish. Fuller has traveled hundreds of miles through the national park by horseback, foot and cross country ski during his 51 years working there.

Cars, campers and trucks line up before sunrise outside the south entrance of Yellowstone National Park, waiting to gain entry to the park in June 2022. George Frey/Getty Images.