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Spouter Geyer
Opelescent Pool
Rainbow Pool
Firehole River

The Firehole River runs along the west side of Yellowstone Park, where you can find most of the geysers in the park. Algae and bacteria, which thrive in tsuper hot water, create the colors in you see along the river and in the pools in Black Sand Basin.

Spouter Geyser erupts from a blue pool every hour or two. Its erupts goes on for ten or eleven hours.

The runoff from Spouter Geyser ponds in the Opelescent Pool, which until the 1950s was a dry pool. Silica, the white substance that coats the ground and the base of the lodgepool pines, killing them.

To see images of the Yellowstone River Gorge and other river gorges, go to quintascott.com.