How often does Old Faithful go off?

The world's most famous geyser, Old Faithful in Yellowstone, currently erupts around 20 times a day. These eruptions are predicted with a 90 percent confidence rate, within a 10 minute variation, based on the duration and height of the previous eruption.



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The mornings (dawn until 11 a.m.) and evenings (6 p.m. until dusk) are perfect window times for beating the tour groups and family wagons and securing a spot with an uninterrupted view. If you prefer the morning, all you need is a trusty alarm clock, maybe a strong cup of coffee and an early start to the day.

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In 2019, a man fell into thermal water near the cone of Old Faithful and suffered severe burns. Two years prior, a man sustained severe burns after falling in a hot spring in the Lower Geyser Basin. In 2016, a man left the boardwalk and died after slipping into a hot spring in Norris Geyser Basin.

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A 19-year-old was badly burned from an iconic geyser in Yellowstone National Park, officials said. Park rangers helped the woman at Old Faithful on Thursday. She had second- and third-degree burns over 5% of her body, park rangers said.

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The Grand Loop takes between 4 to 7 hours to drive in full. During the summer season, cars are the best option for taking a trip around Yellowstone unless you are riding with a bus tour or concessionaire that provides transportation.

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This may have been a bit of an exaggeration, but geysers do emit a bit of a stench due to the elevated levels of sulfuric acid and hydrogen sulfide gas contained within the geysers themselves.

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Photograph of the Old Faithful Geyser erupting in Yellowstone National Park. Waters from Old Faithful contain arsenic concentrations of about 1,500 µg/L. Arsenic is a geogenic, or naturally occurring, chemical element in surface- and groundwaters that is of great public-health concern.

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