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Yellowstone National ParkSeeing the park from horseback gives visitors a chance to cover ground off the beaten path.
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Yellowstone National Park
Mudpots and How They Work
A bubbling mudpot
Bubbling Mudpot
Where hot water is limited and hydrogen sulfide gas is present (emitting the "rotten egg" smell common to thermal areas), sulfuric acid is generated. The acid dissolves the surrounding rock into fine particles of silica and clay that mix with what little water there is to form the seething and bubbling mudpots. The sights, sounds, and smells of areas like Artist and Fountain paint pots and Mud Volcano make these curious features some of the most memorable in the park
 
Yellowstone Wolf.  

Did You Know?
There were no wolves in Yellowstone in 1994. The wolves that were reintroduced in 1995 and 1996 thrived and there are now over 300 of their descendents living in the Greater Yellowstone Area.

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Last Updated: March 06, 2008 at 17:00 EST