Old Faithful Geyser Facts

Old Faithful erupts boiling water up to 185 feet high.

Old Faithful is a cone geyser in Yellowstone National Park.

Old Faithful erupts on average about every 90 minutes.

Old Faithful was named in 1870 during a famous expedition.

The eruption water reaches heights from 106 to 185 feet.

Eruptions last from 1½ to 5 minutes each time.

Old Faithful shoots 14,000 to 32,000 liters of boiling water.

More than 1,000,000 eruptions have been recorded so far.

The interval between eruptions ranges from 34 to 125 minutes.

Longer eruptions mean longer wait times for the next one.

Water temperature reaches 244 degrees Fahrenheit at 72 feet.

Old Faithful erupts quite reliably, making it highly predictable.

Old Faithful has been observed since 1870.