Best Upper Basin

Grand Geyser is a prominent geyser located within Yellowstone National Park’s Upper Basin. It stands out as the tallest reliably predictable geyser globally, consistently erupting with impressive force. The eruptions reach heights of approximately 200 feet due to sustained geothermal heating. Scient...

Giant Geyser is a large, cone-shaped geyser located within the Upper Basin of Yellowstone National Park. It’s notable for its powerful eruptions, which can reach heights of approximately 250 feet. The geyser's behavior is driven by underground thermal activity and steam pressure. Scientists and visi...

Riverside Geyser is a consistently erupting geyser located within Yellowstone National Park’s Upper Basin. It's notable for its reliably predictable eruptions, typically reaching heights of approximately seventy-five feet above the Firehole River. This behavior makes it an important subject of study...

The Beehive Geyser is a prominent feature within Yellowstone National Park’s Upper Basin. It’s notable for its consistently powerful eruptions, reaching heights of approximately 60 to 80 feet through a constricted cone vent. These geysers are driven by superheated water and steam beneath the earth's...

Old Faithful is an active geyser located within Yellowstone National Park’s Upper Basin. Its notable predictability stems from a consistent underground plumbing system fueled by superheated groundwater. Eruptions occur approximately every 60 to 110 minutes, sending water columns up to 185 feet into...

Giantess Geyser is a large geyser within Yellowstone National Park's Upper Basin. It’s notable for its rare, dramatic eruptions which generate significant water pressure and can trigger localized ground vibrations. These events are particularly interesting to volcanologists studying hydrothermal sys...

Fan Geyser is a natural geyser within the Upper Basin of Yellowstone National Park’s Lower Geyser Basin. It’s notable for producing a unique, fan-like eruption pattern when actively steaming. The consistent shape of its spray makes it a subject of study for geologists examining hydrothermal activity...

Splendid Geyser is a natural geyser within Yellowstone National Park’s Upper Basin. It's notable for its infrequent but powerful eruptions reaching heights over sixty meters. These events are driven by geothermal activity and occur when specific conditions align. The geyser is of interest to visitor...

Castle Geyser is a prominent geyser within Yellowstone National Park's Upper Basin. It’s notable for its large, cone-shaped siliceous sinter formation resembling a castle turret and predictable eruption cycle of approximately 10–12 hours, reaching heights of around 90 feet. This feature is particula...

The Mortar Geyser is a natural geyser located within the Upper Basin of Yellowstone National Park’s Lower Geyser Basin. It produces dramatic, intermittent eruptions characterized by forceful blasts of steam and water. These events are notable due to their intensity and frequent occurrence alongside...

Lion Geyser is a prominent geyser within the Lion Group of the Upper Basin in Yellowstone National Park. It’s notable for its substantial size and the powerful, rumbling noises generated by escaping steam – sounds often described as roaring. These eruptions are driven by geothermal activity beneath...

Fan and Mortar are two closely associated cone geysers within Yellowstone National Park’s Upper Geyser Basin. These geysers, named in the late 19th century, exhibit distinct eruption patterns. Fan produces impressive jets reaching approximately 125 feet while Mortar generates bursts up to 80 feet ta...

The Oblong Geyser is a prominent natural feature within Yellowstone National Park’s Upper Basin. It’s notable for its distinctive oblong-shaped crater that frequently erupts with hot water and steam. Located amongst the park's most active geyser fields, it provides an observable example of hydrother...

Vent Geyser is a small geyser in the Grand Group of Yellowstone National Park's Upper Geyser Basin in Wyoming. It is closely connected to Grand Geyser through the group's shared underground hydrothermal system and commonly begins erupting during or shortly after a major Grand eruption. Observers use...

Daisy Geyser is a cone-type geyser situated in the Upper Geyser Basin of Yellowstone National Park in the United States. It is known for its predictable eruption cycle, typically occurring every few hours, which makes it a documented feature for park observers. During an eruption, the geyser project...

Turban Geyser is a geyser in Yellowstone's Upper Geyser Basin, Wyoming, USA, closely linked with Grand Geyser and used by park observers to help predict Grand's major eruptions.

Jewel Geyser is a cone geyser located in Biscuit Basin within Yellowstone National Park's Upper Geyser Basin in Wyoming. It is named for the distinctive pearl-like geyserite beads that line its crater, formed by centuries of mineral deposition from erupting water. Eruptions typically reach heights o...

Sawmill Geyser is a fountain-type geyser located in the Upper Geyser Basin of Yellowstone National Park, named during the 1871 Hayden Geological Survey by expedition member Antoine Schoenborn. The geyser received its name due to the rhythmic, sawing sound it makes during eruptions, which can reach h...

Grotto Geyser is a cone-type geyser in the Upper Geyser Basin of Yellowstone National Park, Wyoming, notable for its irregular, cave-like silica cone structure formed over centuries of mineral deposition. The geyser erupts at irregular intervals and is characterized by extended eruption durations th...

Artemisia Geyser is a cone-type geyser in the Upper Geyser Basin of Yellowstone National Park, located on Geyser Hill near the Firehole River. It is named for the sagebrush (genus Artemisia) that grows in the surrounding area. The geyser is known for its large, deep blue pool and infrequent eruption...

Lioness Geyser is a minor thermal vent in Yellowstone National Park's Upper Geyser Basin that serves as a secondary feature within the Lion Group.

Penta Geyser is a cone-type geyser in the Upper Geyser Basin of Yellowstone National Park. Its name refers to five principal vents arranged within its sinter structure, and it belongs to the interconnected Sawmill Complex of geothermal features. Its activity can vary as water and pressure shift thro...

Spasmodic Geyser is a thermal feature in the Sawmill Group of Yellowstone National Park's Upper Geyser Basin in Wyoming. Its activity is characterized by irregular eruptions from multiple vents, which accounts for its descriptive name. The geyser forms part of a densely clustered hydrothermal area n...

West Triplet Geyser is a thermal feature situated in the Upper Geyser Basin of Yellowstone National Park, Wyoming. It is one of three closely spaced vents collectively known as the Triplet Geysers, located in proximity to the larger Grand Geyser. The geyser erupts intermittently, typically character...

Solitary Geyser is a small fountain geyser near the Upper Geyser Basin in Yellowstone National Park, Wyoming. The feature was originally a hot spring whose water was diverted to supply a bathing pool in 1914; lowering its water level altered the system and initiated eruptions. It now produces freque...

A geyser in Yellowstone National Park's Black Sand Basin, located along Iron Spring Creek, known for infrequent but vigorous eruptions from a position beside a rocky cliff.

Rocket Geyser is a Yellowstone geyser in the Upper Geyser Basin's Grotto Group, often linked to short eruptions of nearby Grotto Geyser.

A geyser in Yellowstone National Park known for producing a fine mist or spray during eruptions, situated among the many hydrothermal features of the Upper Geyser Basin.

A geyser in Yellowstone National Park's Upper Geyser Basin named for its golden-hued mineral deposits, producing irregular eruptions reaching approximately 20 to 25 feet.