Abyss Pool is about 16 m (53 ft) deep and contains alkaline-chloride hydrothermal fluids that in the summer of 2024 had a temperature of 181 °F (83 °C).
Why is Yellowstone called Yellowstone?
Contrary to popular belief, Yellowstone was not named for the abundant rhyolite lavas in the Grand Canyon of Yellowstone that have been chemically altered by reactions with steam and hot water to create vivid yellow and pink colors. Instead, the name was attributed as early as 1805 to Native Americans who were referring to yellow sandstones along the banks of the Yellowstone River in eastern Montana, several hundred miles downstream and northeast of the Park.
Learn more: Alterations to go! Hydrothermal alteration in Yellowstone
Related
When will the next large earthquake occur in Yellowstone?
Why are there so many earthquakes at Yellowstone?
What is the relationship between volcanism and the geysers and hot springs in Yellowstone?
How hot is Yellowstone?
How fast is the hotspot moving under Yellowstone?
Can we use the heat from Yellowstone for energy?

Abyss Pool is about 16 m (53 ft) deep and contains alkaline-chloride hydrothermal fluids that in the summer of 2024 had a temperature of 181 °F (83 °C).

Vibrant, multicolored extremophilic bacteria in the outflow from Grand Prismatic Spring, Yellowstone National Park
linkView of the vibrant, multicolored extremophilic bacteria in the outflow from Grand Prismatic Spring at the Midway Geyser Basin, Yellowstone National Park. Photo by Elizabeth Mordensky, May 12, 2024.
Vibrant, multicolored extremophilic bacteria in the outflow from Grand Prismatic Spring, Yellowstone National Park
linkView of the vibrant, multicolored extremophilic bacteria in the outflow from Grand Prismatic Spring at the Midway Geyser Basin, Yellowstone National Park. Photo by Elizabeth Mordensky, May 12, 2024.

Yellowstone River Valley, northeast of Billings, from 37,002 feet, Delta Flight 610, Seattle to Atlanta, Yellowstone County, Montana . Photograph by Alan Cressler, USGS
Yellowstone River Valley, northeast of Billings, from 37,002 feet, Delta Flight 610, Seattle to Atlanta, Yellowstone County, Montana . Photograph by Alan Cressler, USGS
Public Lecture on Yellowstone Volcano by Jake Lowenstern at Menlo Park, CA on January 23, 2014. The Q&A at the end of the talk can be found on the original source video (Source URL).
Public Lecture on Yellowstone Volcano by Jake Lowenstern at Menlo Park, CA on January 23, 2014. The Q&A at the end of the talk can be found on the original source video (Source URL).

USGS emeritus geologist Robert Christiansen describes his career working on Yellowstone geology from the 1960's through 2014. Bob's work along with his USGS colleagues revealed the details of Yellowstone's explosive volcanic past including mapping and dating of past super eruptions 2.1 million years ago, 1.3 million years ago and 640,000 years ago.
USGS emeritus geologist Robert Christiansen describes his career working on Yellowstone geology from the 1960's through 2014. Bob's work along with his USGS colleagues revealed the details of Yellowstone's explosive volcanic past including mapping and dating of past super eruptions 2.1 million years ago, 1.3 million years ago and 640,000 years ago.
USGS emeritus geologist Patrick Muffler describes his career working on Yellowstone geysers and hydrothermal systems from the 1960's through 2014. Patrick's work along with his USGS colleagues revealed the details of Yellowstone's explosive volcanic past and how its spectacular geysers and other hydrothermal features work.
USGS emeritus geologist Patrick Muffler describes his career working on Yellowstone geysers and hydrothermal systems from the 1960's through 2014. Patrick's work along with his USGS colleagues revealed the details of Yellowstone's explosive volcanic past and how its spectacular geysers and other hydrothermal features work.
USGS emeritus geologist RobertFournier describes his career working on Yellowstone geysers and hydrothermal systems from the 1960's through 2014. Bob's work along with his USGS colleagues revealed the details of Yellowstone's explosive volcanic past and how its spectacular geysers and other hydrothermal features work.
USGS emeritus geologist RobertFournier describes his career working on Yellowstone geysers and hydrothermal systems from the 1960's through 2014. Bob's work along with his USGS colleagues revealed the details of Yellowstone's explosive volcanic past and how its spectacular geysers and other hydrothermal features work.

This is nearly the same view depicted in the 1872 sketch by Thomas Moran, and printed for the 150th anniversary commemoration of DOI.
This is nearly the same view depicted in the 1872 sketch by Thomas Moran, and printed for the 150th anniversary commemoration of DOI.

Interpretive reconstruction of the Yellowstone Plateau region before initial plateau volcanism (a little before 2 million years ago). The region was entirely an elevated and faulted mountainous terrain with no basin in the present plateau area.
Interpretive reconstruction of the Yellowstone Plateau region before initial plateau volcanism (a little before 2 million years ago). The region was entirely an elevated and faulted mountainous terrain with no basin in the present plateau area.
Yellowstone Volcano Observatory 2023 annual report
Yellowstone Volcano Observatory 2022 annual report
Yellowstone Volcano Observatory 2020 annual report
Yellowstone Volcano Observatory
The Yellowstone hotspot, Greater Yellowstone ecosystem, and human geography
Steam explosions, earthquakes, and volcanic eruptions -- what's in Yellowstone's future?
Tracking changes in Yellowstone's restless volcanic system
Related
When will the next large earthquake occur in Yellowstone?
Why are there so many earthquakes at Yellowstone?
What is the relationship between volcanism and the geysers and hot springs in Yellowstone?
How hot is Yellowstone?
How fast is the hotspot moving under Yellowstone?
Can we use the heat from Yellowstone for energy?

Abyss Pool is about 16 m (53 ft) deep and contains alkaline-chloride hydrothermal fluids that in the summer of 2024 had a temperature of 181 °F (83 °C).
Abyss Pool is about 16 m (53 ft) deep and contains alkaline-chloride hydrothermal fluids that in the summer of 2024 had a temperature of 181 °F (83 °C).

Vibrant, multicolored extremophilic bacteria in the outflow from Grand Prismatic Spring, Yellowstone National Park
linkView of the vibrant, multicolored extremophilic bacteria in the outflow from Grand Prismatic Spring at the Midway Geyser Basin, Yellowstone National Park. Photo by Elizabeth Mordensky, May 12, 2024.
Vibrant, multicolored extremophilic bacteria in the outflow from Grand Prismatic Spring, Yellowstone National Park
linkView of the vibrant, multicolored extremophilic bacteria in the outflow from Grand Prismatic Spring at the Midway Geyser Basin, Yellowstone National Park. Photo by Elizabeth Mordensky, May 12, 2024.

Yellowstone River Valley, northeast of Billings, from 37,002 feet, Delta Flight 610, Seattle to Atlanta, Yellowstone County, Montana . Photograph by Alan Cressler, USGS
Yellowstone River Valley, northeast of Billings, from 37,002 feet, Delta Flight 610, Seattle to Atlanta, Yellowstone County, Montana . Photograph by Alan Cressler, USGS
Public Lecture on Yellowstone Volcano by Jake Lowenstern at Menlo Park, CA on January 23, 2014. The Q&A at the end of the talk can be found on the original source video (Source URL).
Public Lecture on Yellowstone Volcano by Jake Lowenstern at Menlo Park, CA on January 23, 2014. The Q&A at the end of the talk can be found on the original source video (Source URL).

USGS emeritus geologist Robert Christiansen describes his career working on Yellowstone geology from the 1960's through 2014. Bob's work along with his USGS colleagues revealed the details of Yellowstone's explosive volcanic past including mapping and dating of past super eruptions 2.1 million years ago, 1.3 million years ago and 640,000 years ago.
USGS emeritus geologist Robert Christiansen describes his career working on Yellowstone geology from the 1960's through 2014. Bob's work along with his USGS colleagues revealed the details of Yellowstone's explosive volcanic past including mapping and dating of past super eruptions 2.1 million years ago, 1.3 million years ago and 640,000 years ago.
USGS emeritus geologist Patrick Muffler describes his career working on Yellowstone geysers and hydrothermal systems from the 1960's through 2014. Patrick's work along with his USGS colleagues revealed the details of Yellowstone's explosive volcanic past and how its spectacular geysers and other hydrothermal features work.
USGS emeritus geologist Patrick Muffler describes his career working on Yellowstone geysers and hydrothermal systems from the 1960's through 2014. Patrick's work along with his USGS colleagues revealed the details of Yellowstone's explosive volcanic past and how its spectacular geysers and other hydrothermal features work.
USGS emeritus geologist RobertFournier describes his career working on Yellowstone geysers and hydrothermal systems from the 1960's through 2014. Bob's work along with his USGS colleagues revealed the details of Yellowstone's explosive volcanic past and how its spectacular geysers and other hydrothermal features work.
USGS emeritus geologist RobertFournier describes his career working on Yellowstone geysers and hydrothermal systems from the 1960's through 2014. Bob's work along with his USGS colleagues revealed the details of Yellowstone's explosive volcanic past and how its spectacular geysers and other hydrothermal features work.

This is nearly the same view depicted in the 1872 sketch by Thomas Moran, and printed for the 150th anniversary commemoration of DOI.
This is nearly the same view depicted in the 1872 sketch by Thomas Moran, and printed for the 150th anniversary commemoration of DOI.

Interpretive reconstruction of the Yellowstone Plateau region before initial plateau volcanism (a little before 2 million years ago). The region was entirely an elevated and faulted mountainous terrain with no basin in the present plateau area.
Interpretive reconstruction of the Yellowstone Plateau region before initial plateau volcanism (a little before 2 million years ago). The region was entirely an elevated and faulted mountainous terrain with no basin in the present plateau area.