One of the best locations to see wildlife in Yellowstone is in Hayden Valley, located on the eastern side of the park. The valley is between Yellowstone Falls and Yellowstone Lake, with the Yellowstone River connecting the two ( it is 7 miles long and 7 miles wide). The valley floor once was an ancient lake bed from a time when Yellowstone Lake was much larger. It has long been a wildlife location providing the natives with a source of food and, later, trappers with furs. Alas, I spent some time wandering the valley looking for wildlife and didn't see any. On the way back to the Yellowstone Hotel one evening, I stopped here to capture the late evening light and a perfect reflection.