Overcast early, then warming

Usual boardwalk tour of old faithful, numerous geysers, steam vents, mudpots, waterholes etc.

Impressive landscape, zillions of guide highlights.

A good day for wildlife. Elk, bison, raven, chipmunks, bio films, extremophiles, variety without end of bacteria. Rocks that used to be there and are now here.

Yellowstone is a tour of geologic activity and geology. The Boogs have seen a lot of landscape but few areas compare to this.