Pump Geyser, Cone geyser in Upper Geyser Basin, Yellowstone National Park, USA
Pump Geyser is a cone geyser in the Upper Geyser Basin within Yellowstone National Park, sitting at about 7,369 feet elevation. The feature erupts regularly throughout the day, shooting water columns ranging from a few feet to about 15 feet high.
The geyser was named by Frank Jay Haynes, who served as Yellowstone's official photographer from 1883 to 1916. Haynes captured the park's natural features through photography and named this one after its visual and auditory characteristics.
The natural phenomenon represents the geological power of Yellowstone, drawing visitors who witness frequent water bursts throughout the day.
Visitors can watch eruptions from designated wooden boardwalks in the Geyser Hill Complex, where several thermal features are located close together. The site is easily accessible on foot, and frequent daytime activity provides multiple opportunities to observe the geyser's behavior.
The geyser produces a distinctive thumping sound during its activity, resembling the mechanical motion of an old pump. This characteristic sound is the reason for its name and makes it easy to recognize the feature by sound alone even before seeing it.
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