Giant Geyser, Cone geyser in Upper Geyser Basin, Yellowstone National Park, US
Giant Geyser is a cone-shaped geyser in the Upper Geyser Basin of Yellowstone National Park that ejects water and steam during eruptions. The hot spring sits among other geothermal features in a landscape formed by underground heat and mineral-rich water deposits.
The geyser was first documented in 1870 during an exploration expedition and named for its size and power compared to others in the area. Its eruption frequency has changed over the decades since its discovery.
Native American tribes recognized the geothermal features of Yellowstone, including Giant Geyser, as sacred places within their ancestral territories.
Visitors can watch this geyser from marked trails and designated viewing areas throughout the basin. Pay attention to warning signs and keep distance from the hot water and mineral formations.
This geyser has shown unpredictable behavior over the decades, with long gaps between eruptions that vary widely. Its irregular activity makes it difficult for visitors to predict when an eruption might occur.
Location: Teton County
Part of: Giant Group
GPS coordinates: 44.47065,-110.84055
Latest update: December 6, 2025 17:41
Geysers represent some of the most visible expressions of hydrothermal activity, occurring where underground water reservoirs are heated by magmatic sources. Yellowstone National Park in Wyoming holds more than half of the world's known geysers, including Old Faithful with its reliable eruptions...
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