description Fan Geyser Overview
Fan Geyser, located in Yellowstone National Park's Lower Geyser Basin, is named for its distinct, fan-shaped water spray during active periods.
help Fan Geyser FAQ
Where is Fan Geyser located in Yellowstone?
Fan Geyser is located in the Lower Geyser Basin of Yellowstone National Park, specifically in the Fountain Group area. It sits right alongside its closely related neighbor, Mortar Geyser.
Why is it called Fan Geyser?
It earned its name due to its distinct, fan-shaped water spray that it produces during its active eruption periods. The water is forcefully pushed out of multiple vents at an angle, creating a wide, sweeping effect.
How often does Fan Geyser erupt?
Fan Geyser is an unpredictable thermal feature, and its eruption intervals can vary significantly, sometimes remaining dormant for long periods. When it does erupt, its activity is often linked to the eruptions of the adjacent Mortar Geyser.
Can you walk right up to Fan Geyser in Yellowstone?
No, visitors must stay on designated boardwalks to safely view Fan Geyser and the surrounding hydrothermal features. Walking on the fragile, boiling geyserite crust is strictly prohibited by the National Park Service to protect both the ecosystem and human lives.
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