What an amazing place....for the past two days we have toured the park.  First day we did the lower loop and today 1/2 of the upper loop.   this loop is closed on the eastside due to the weather.   It was a great day for both trips. We saw many geysers, various animals, snowed covered mountains, waterfalls, etc.   I can't say enough about this park.   It's much bigger and more beautiful than I remember it as a kid.