With the re-introduction of the gray wolf, every species present before humans ever saw the park once again have a home there. The variety of geologic features along with the abundant wildlife is amazing. It gets a bit crowded at times, but it's a large place and one can usually find a quiet, serene spot with only a short hike. Winter is beautiful, but the climate is harsh and it's hard to watch weak animals suffer. Spring brings new life and it's great fun to watch grizzly cubs playing on the high slopes with their mother.
Summer brings mosquitoes and hot days, but the fishing is fantastic.
Finally, the valleys fill with the familiar call of the elk rut during the fall. Each corner of the park holds special attractions. In the summer of 1996, I took a trip to the Southeast arm of Yellowstone Lake and then backpacked up the river and eventually outside the park. This was a wonderfully isolated spot that I hope to return to. View images included in the Yellowstone and Grand Teton Screen Saver Yellowstone isn't without controversy.