PointofInterestRoadSigns.com - Yellowstone National Park - Giant Geyser


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Yellowstone National Park - Giant Geyser


Location of sign - Upper Geyser Basin near Old Faithful in Yellowstone National Park


Photo taken June 2008

Giant Geyser, Giant Geyser sign, Upper Geyser Basin Yellowstone National Park  

Close-up view of sign


Giant Geyser, Giant Geyser sign, Upper Geyser Basin Yellowstone National Park

Wide view of sign


Text of sign:


Giant Geyser

When active, Giant Geyser is one of the largest in the world.  Historic accounts describe Giant's eruptions soaring to heights of

250 to 300 feet.  However, recent eruptions have ranged from 200 to 250 feet.


Giant Geyser displays cycles of activity and dormancy.  The unpredictability of Giant is due, in part, to interconnections between

it and the geysers and hot springs of the nearby Grotto Group.

Fast Facts:


Giant is a cone-type geyser.


When active, Giant's eruptions may reach heights of 200 to 250 feet.


Giant's eruptions can last from 1 to 1.5 hours and expel more than a million gallons of water.

Shrouded in Antiquity


The large sinter shroud surrounding Giant's vent may be an indication of the geyser's great age.  The slow accumulation of mineral

(1 to 2 inches every 100 years) indicates that Giant could be thousands of years old.


This exhibit made possible by a generous grant from the Yellowstone Association.


Graphics on the sign


In addition to the text there is a picture of Giant Geyser erupting and a picture of a 1870's woodcut of Giant Geyser.


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