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Old Faithful can vary in height from 100-180 feet with an average near 130-140 feet. This has been the historical range of its recorded height. Eruptions normally last between 1.5 to 5 minutes.
Old Faithful is losing steam. Yellowstone National Park’s landmark geyser has spewed scalding-hot groundwater every 90 to 94 minutes on average, about 17 times a day, since time immemorial.
How Old Faithful works Old Faithful earned its name for its regular eruptions, which average every 92 minutes. Just after an eruption, there's a 15-minute recharge period with low water levels.
Man severely burned in hot spring at Old Faithful A 48-year-old man was severely burned after falling into a hot spring in Yellowstone National Park in Wyoming on Sunday night, officials said.