Old Faithful

Old Faithful in Yellowstone National Park, Wyoming is a stand alone. It erupts between 35 minutes and 2 hours. And the eruptions lasts between 1.5 an 5 minutes. The geyser spews out 3700 to 8400 gallons of boing hot water. Old Faithful was the first geyser named in the Park, 1870. There are some 500 geysers yet Old Faithful is predictable when the eruption will occur.