This is one of the geysers at the Norris Geyser Basin. Norris is the most active geyser basin in the park.
There were dozens of geysers and hot spring pools in any given place around the Norris geyser basin. This was very cool to see and photograph, but not so good on the nose, with all the hydrogen sulfide gas.
Inside many of the pools you can tell how hot they are by the colors of the bacteria that grow in them. If it is so hot that there are no bacteria, usually over 133 degrees Fahrenheit, the pool will generally be blue like any other water. If you can see shades of red or yellow, the pool is of medium heat, about 100-133 degrees Fahrenheit. If there are any greens, those are thermophillic algae and they only grow in the cooler (relatively) waters at below 100 degrees Fahrenheit.
The chipmunks that we saw out west all had tails. They seemed to like the attention at Yellowstone and often came out for photos.
This is the lower falls at the Artist's Point. We had a great view of the canyon below and of the falls.
The bison that we saw in the park were usually laying down, and didn't seem to mind being close to the roadways.
I managed to get a good picture of Tucker looking out the side window trying to see one of his own kind.
Here is Old Faithful before it erupted. We actually got to the geyser as it was finishing one eruption and had to wait around an hour and a half to see the next one.
And here is Old Faithful at it tallest when it first started to erupt.
The eruption went on for about 2 or 3 minutes until it got back down to a small shower.
This is picture of the Red Spouter, a hot spring that is very muddy with clay and therefore has a red color.
These are some elk that we saw near our campsite area at Indian Creek.
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