Immediately after the group arrived at the Snow Lodge at Old Faithful, I went with a smaller group out on a ski. We skied past geysers and steaming pools and into open meadows of snow which shined in the sunshine. These are the kinds of wide open spaces that characterize Yellowstone. We skied down to Biscuit Basin. The thermal basin was named for the biscuit-like deposits that used to surround Sapphire Pool. Following the 1959 Hebgen Lake Earthquake, Sapphire erupted, and the "biscuits" were blown away. With its beautiful color, Sapphire Pool was one of the highlights of the trip. We returned through the geyser basin and Old Faithful erupted just as we arrived.