The Dye Clan
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Biscuit Basin

Laura crossing the Firehole River on the way to Biscuit Basin.

Biscuit Basin in the Old Faithful Area is home to Sapphire Pool, Mustard Spring, Avoca Spring, Shell Geyser, Jewel Geyser, and several other geothermal features.

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Trip Report: July 12, 2011

Biscuit Basin is part of Upper Geyser Basin.

The following information was taken from the Old Faithful Area Trail Guide, which is available at the Old Faithful visitor center.

Three miles (5 km) north of Old Faithful is Biscuit Basin, named for the unusual biscuit-like deposits that used to surround Sapphire Pool. Following the 1959 Hebgen Lake Earthquake, Sapphire erupted, and the "biscuits" were blown away; it last erupted in 1991. Sapphire remains one of the most beautiful blue pools in the park. Mustard Spring provides a bright color contrast, and Jewel Geyser adds excitement as it erupts every 7-10 minutes.


Biscuit Basin at EveryTrail

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