Yellowstone National Park (YNP) makes up 3,472 square miles or (2,221,766 acres), a vast expanse of geological wonders, majestic wildlife, and stunning scenery. You could spend weeks exploring and only scratch the surface. Most people have a short window to explore, which is plenty of time to see the highlights! We’ve outlined a two-day itinerary that incorporates the best of Yellowstone. If you’re visiting in the winter, you could do the first half of the trip since the road from Gardiner to Cooke City is the only road open to vehicles year-round.