Where is the Yellowstone National Park locate?

Question

Where is the Yellowstone National Park locate?

Answer 1

california

Answer 2

mostly in Wyoming, though parts extend into Montana and Idaho.

Answer 3

CA, but there can be more than one park with that name.

Answer 4

Yellowstone National Park is located in the northwest corner of Wyoming, USA.  Small portions of the park also extend into Idaho and Montana.

Yellowstone was the first national park ever established and so is the world's oldest national park.