Trivia: How many states does Yellowstone National Park cover?
The correct answer is Three
So why is this answer correct? : Yellowstone National Park is America’s oldest national park, and it spans across three western states: Idaho, Montana, and Wyoming. Wyoming is home to 96% of Yellowstone, including the famed Old Faithful geyser, but 1% of the park is in Idaho, and 3% is in Montana.