City of Shoshoni Elevation 4820 feet. Junction of highway #26, south to Riverton. NOTE highway #789 overlaps highway #26 at this point south. East to community of Casper. Via highway #26 With half of the earth’s geothermal features, Yellowstone holds the planet’s most diverse and intact collection of geysers, hot springs, mudpots, and fumaroles. Its more than 300 geysers make up two thirds of all those found on earth.