Upper Geyser Basin

The Upper Geyser Basin is best known for containing Old Faithful Geyser (along with Old Faithful Lodge and Visitor's Center) but also contains many of the more predictable geysers in the park. It is considered the largest concentration of active geysers in the world.[citation needed]

Major/Predictable Geysers:

 * Old Faithful
 * Grand
 * Castle
 * Riverside
 * Daisy

Lesser Known/Less Predictable Geysers:

 * Artemisia
 * Aurum
 * Beehive
 * Giant Group
 * Giant
 * Giantess
 * Grotto
 * Lion Group
 * Lion
 * Lioness
 * Little Cub
 * Oblong

Minor Geysers:

 * Anemone
 * Big Anemone
 * Little Anemone
 * Churn
 * Economic
 * Penta
 * Rocket
 * Sawmill
 * Spa
 * Spasmodic