Had it not been for a later meal at the Lake Yellowstone Hotel dining room, the meal we had at the Obsidian Dining Room in the Old Faithful Snow Lodge would have received five stars. As it was, the service there was the best in the park--friendly and attentive. The atmosphere is not as grand as the Old Faithful Inn dining room, but it was sunny and pleasant. The menu had some interesting choices not found elsewhere. It was also great to walk right in without reservations. I would definitely recommend dining at the Obsidian Dining Room if you are staying in the Old Faithful area, and want a nice, relaxed dining experience with good food.