Interesting Facts About Old Faithful

  • Eruptions can shoot 3,700 to 8,400 US gallons of boiling water.
  • Shoots water at a height of 106 to 185 feet.
  • Erupts every 60 minutes to 2 hours.
  • Eruptions last 1.5 to 5 minutes.
  • The lowest recorded sighting was 72 feet deep into the geyser.  Temperature measurements of the water
              at 72ft depth was 244 °F.



  • Old Faithful is not the tallest or largest geyser, but it is the most popular.
  • Most popular because of its high frequency of eruptions.
  • Tallest height of an eruption has been recorded at 185 feet.
  • Nearly 140,000 eruptions have been officially recorded.