The most famous geyser in Yellowstone is Old Faithful. Most geysers erupt unpredictability but Old Faithful erupts approx. every 90 mins (give or take 10 mins). An eruption can last up to 5 mins and expels up to 8,400 gallons of boiling water and reaches a height of 184 feet. We saw Old Faithful erupt at 8am. There was lots of steam with this eruption. Later that afternoon we returned to see it again. Less steam this time due to warmer the air temperature. The majority of the world’s active geysers are located in in Yellowstone’s Upper Geyser Basin.
The historic Old Faithful Lodge is located within viewing distance from Old Faithful.