We encountered all kinds of weather at Yellowstone, sun, rain, wind, temperature in the 40s to begin with, shooting up to the 70s in the afternoon. It's fascinating how different areas of the Park have their own climates. Swan Lake can be cold and windy (to the left is a photo of the Glen Creek Trail, just north of Swan Lake), Mammoth is heated by thermal activity, Gardiner is desert-hot at times, the thermal basins can be much colder in general. Well, all of that made painting difficult, but I heard no complaints from my students. As I wrote yesterday, they really impressed me with their can-do approach to plein air watercolor!