According to a park ranger, the water coming out of Old Faithful (left), has taken 500 years to get from the surface as rain or snow and down to the geothermal where it gets blasted out as a geyser.
(right) A fumerole in Norris Geyser Basin. (below) Grand Prismatic Spring in Midway Geyser Basin.
(far left) Rick contemplates the best angle for video of the now (apparently) dormant Excelsior Geyser—last eruption in 1880. (above) A hat that has blown into the hot water of Excelsior Geyser. (right) The arrow points to the hat in Excelsior.
(left) We caught the last gasp of an eruption of Castle Geyser. (middle) It wouldn't really feel like Yellowstone without at least one encounter with a buffalo blocking traffic on the highway. (right) A big elk wading in the Madison River.
(below) The hotter the water, the more clear it is. The pond below displays a wide range of colors because it is "cold" enough for algae and microbes to grow. (below) Rick & Carol at the only intentional interment in the park (i.e. doesn't count people who have fallen in to volcanic thingies by mistake) (below) The Riverside Geyser, named because it is next to the Firehole River. Clever, no?
(left & middle, below) One day, while Rick & Julia were off fishing, we decided to go hiking in search of Fairy Falls. Turns out that three maps each had different scheme for trails, so we never got to the falls, but did get to hike through some infrequently traveled territory that was quite impressive.
(below) Another example of the colors that can develop when the water temperature is right.
The very spectacular Grand Canyon of the Yellowstone River
Rick & John at Prismatic Springs.
Julia looking for the best angle to photograph Prismatic Springs.