The Dye Clan
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  • TR: Jul 2011

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.

Interactive Map

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Waypoints

WaypointLatitudeLongitudeDescription
Black Opal Spring-110.853594875419544.48513264747808
Wall Pool-110.8538684874744.48525243353203
Sapphire Pool-110.855270052124144.4850266339406
Jewel Geyser-110.856161847118144.48491675162791
Shell Geyser-110.856877323653744.4848411474303
Silver Globe-110.857368429544744.48518556107701
Avoca Spring-110.857297505073944.48534012012799
Black Diamond Pool-110.85417051200744.48534149136668
Mustard Spring-110.856149360015244.48595924533095
Black Pearl Geyser-110.855940914386644.48567668703985

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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.

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