Yellowstone National Park's nearly 3,500 square miles ... Grant, and the South. Montana's North and Northeast entrances lead directly into the Mammoth Hot Springs and Tower-Roosevelt areas.

Summertime boat rentals and scenic cruises are available on Yellowstone Lake. Both are provided through Yellowstone National ... from both the park's south and west entrances and facilities ...

Trying to plan your Yellowstone itinerary? It’s not easy, considering the massive size of America’s first National Park. You’d need a few lifetimes to explore all 2.2 million acres.