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).
How hot is Yellowstone?
Yellowstone is a plateau high in the Rocky Mountains, and is snowbound for over six months per year. The mean annual temperature is 2.2°C (36°F), barely above the freezing point of water. However, Yellowstone is also an active geothermal area with hot springs emerging at ~92°C (~198°F) (the boiling point of water at Yellowstone's mean altitude) and steam vents reported as high as 135°C (275°F). Only about 0.3% of the park's terrain is thermal ground, so most places are no hotter than anywhere else in the Rockies.
In some of Yellowstone's thermal areas, heat flow is over 100 watts per square meter, about 50 times that of Yellowstone's average and ~2000 times that of average North American terrain. This enormous heat flow is derived from the molten rock or magma in the crust beneath the caldera, which ultimately is generated by the Yellowstone Hot Spot, an anomalously hot region of the Earth's mantle hundreds of kilometers beneath the surface.
Learn more:
Related
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Why is Yellowstone called Yellowstone?
When was the last time Yellowstone erupted?
Can we use the heat from Yellowstone for energy?
Can we drill into Yellowstone to stop it from erupting?
What type of eruption will Yellowstone have if it erupts again?
How big is the magma chamber under Yellowstone?

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).
A view of the Grand Prismatic Hot Spring from the vantage point of the Grand Prismatic Overlook Trail in Yellowstone National Park, Wyoming.
A view of the Grand Prismatic Hot Spring from the vantage point of the Grand Prismatic Overlook Trail in Yellowstone National Park, Wyoming.
A view of Castle Geyser erupting as a rainbow rises out and over the eruption. Castle Geyser is located in the Upper Geyser Basin of Yellowstone National Park, Wyoming.
A view of Castle Geyser erupting as a rainbow rises out and over the eruption. Castle Geyser is located in the Upper Geyser Basin of Yellowstone National Park, Wyoming.
An explosive eruption of silica water erupts from Beehive Geyser located in the Upper Geyser Basin in Yellowstone National Park, Wyoming. The Upper Geyser Basin is also home to the famous Old Faithful geyser which sits just behind Beehive Geyser in the distance.
An explosive eruption of silica water erupts from Beehive Geyser located in the Upper Geyser Basin in Yellowstone National Park, Wyoming. The Upper Geyser Basin is also home to the famous Old Faithful geyser which sits just behind Beehive Geyser in the distance.

Dr. Kenneth Pierce studied the geology and geomorphology of the greater Yellowstone area for nearly his entire career with the U.S. Geological Survey. From 1965 to present, Dr.
Dr. Kenneth Pierce studied the geology and geomorphology of the greater Yellowstone area for nearly his entire career with the U.S. Geological Survey. From 1965 to present, Dr.

Robert B. Smith of the University of Utah has been collaborating with USGS scientists on Yellowstone geologic topics since the 1960’s. In this interview Bob describes nuances of the Yellowstone volcano story.
Robert B. Smith of the University of Utah has been collaborating with USGS scientists on Yellowstone geologic topics since the 1960’s. In this interview Bob describes nuances of the Yellowstone volcano story.
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).
Visitors watching an eruption of Old Faithful Geyser from the Old Faithful Inn's balcony.
Visitors watching an eruption of Old Faithful Geyser from the Old Faithful Inn's balcony.

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.
USGS Scientist-in-Charge of Yellowstone Volcano Observatory, Jake Lowenstern, answers the following questions to explain volcanic eruptions at Yellowstone: When was the last supereruption at Yellowstone?", "Have any eruptions occurred since the last supereruption?", "Is Yellowstone overdue for an eruption?", "What does the magma below indicate about a possible erupt
USGS Scientist-in-Charge of Yellowstone Volcano Observatory, Jake Lowenstern, answers the following questions to explain volcanic eruptions at Yellowstone: When was the last supereruption at Yellowstone?", "Have any eruptions occurred since the last supereruption?", "Is Yellowstone overdue for an eruption?", "What does the magma below indicate about a possible erupt
USGS Scientist-in-Charge of Yellowstone Volcano Observatory, Jake Lowenstern, answers the following questions to explain volcanic features at Yellowstone: "How do we know Yellowstone is a volcano?", "What is a Supervolcano?", "What is a Caldera?","Why are there geysers at Yellowstone?", and "What are the other geologic hazards in Yellowstone?"
USGS Scientist-in-Charge of Yellowstone Volcano Observatory, Jake Lowenstern, answers the following questions to explain volcanic features at Yellowstone: "How do we know Yellowstone is a volcano?", "What is a Supervolcano?", "What is a Caldera?","Why are there geysers at Yellowstone?", and "What are the other geologic hazards in Yellowstone?"
USGS Scientist-in-Charge of Yellowstone Volcano Observatory, Jake Lowenstern, answers the following questions to provide a tour of the Yellowstone Volcano Observatory: "What is YVO?", "How do you monitor volcanic activity at Yellowstone?", "How are satellites used to study deformation?", "Do you monitor geysers or any other aspect of the Park?", "Are earthquakes and
USGS Scientist-in-Charge of Yellowstone Volcano Observatory, Jake Lowenstern, answers the following questions to provide a tour of the Yellowstone Volcano Observatory: "What is YVO?", "How do you monitor volcanic activity at Yellowstone?", "How are satellites used to study deformation?", "Do you monitor geysers or any other aspect of the Park?", "Are earthquakes and
Yellowstone Volcano Observatory 2022 annual report
Yellowstone Volcano Observatory 2020 annual report
Geologic field-trip guide to the volcanic and hydrothermal landscape of the Yellowstone Plateau
U.S. Geological Survey Volcano Hazards Program—Assess, forecast, prepare, engage
Steam explosions, earthquakes, and volcanic eruptions -- what's in Yellowstone's future?
Tracking changes in Yellowstone's restless volcanic system
The Quaternary and Pliocene Yellowstone Plateau volcanic field of Wyoming, Idaho, and Montana
Related
How hot is a Hawaiian volcano?
Why is Yellowstone called Yellowstone?
When was the last time Yellowstone erupted?
Can we use the heat from Yellowstone for energy?
Can we drill into Yellowstone to stop it from erupting?
What type of eruption will Yellowstone have if it erupts again?
How big is the magma chamber under Yellowstone?

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).
A view of the Grand Prismatic Hot Spring from the vantage point of the Grand Prismatic Overlook Trail in Yellowstone National Park, Wyoming.
A view of the Grand Prismatic Hot Spring from the vantage point of the Grand Prismatic Overlook Trail in Yellowstone National Park, Wyoming.
A view of Castle Geyser erupting as a rainbow rises out and over the eruption. Castle Geyser is located in the Upper Geyser Basin of Yellowstone National Park, Wyoming.
A view of Castle Geyser erupting as a rainbow rises out and over the eruption. Castle Geyser is located in the Upper Geyser Basin of Yellowstone National Park, Wyoming.
An explosive eruption of silica water erupts from Beehive Geyser located in the Upper Geyser Basin in Yellowstone National Park, Wyoming. The Upper Geyser Basin is also home to the famous Old Faithful geyser which sits just behind Beehive Geyser in the distance.
An explosive eruption of silica water erupts from Beehive Geyser located in the Upper Geyser Basin in Yellowstone National Park, Wyoming. The Upper Geyser Basin is also home to the famous Old Faithful geyser which sits just behind Beehive Geyser in the distance.

Dr. Kenneth Pierce studied the geology and geomorphology of the greater Yellowstone area for nearly his entire career with the U.S. Geological Survey. From 1965 to present, Dr.
Dr. Kenneth Pierce studied the geology and geomorphology of the greater Yellowstone area for nearly his entire career with the U.S. Geological Survey. From 1965 to present, Dr.

Robert B. Smith of the University of Utah has been collaborating with USGS scientists on Yellowstone geologic topics since the 1960’s. In this interview Bob describes nuances of the Yellowstone volcano story.
Robert B. Smith of the University of Utah has been collaborating with USGS scientists on Yellowstone geologic topics since the 1960’s. In this interview Bob describes nuances of the Yellowstone volcano story.
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).
Visitors watching an eruption of Old Faithful Geyser from the Old Faithful Inn's balcony.
Visitors watching an eruption of Old Faithful Geyser from the Old Faithful Inn's balcony.

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.
USGS Scientist-in-Charge of Yellowstone Volcano Observatory, Jake Lowenstern, answers the following questions to explain volcanic eruptions at Yellowstone: When was the last supereruption at Yellowstone?", "Have any eruptions occurred since the last supereruption?", "Is Yellowstone overdue for an eruption?", "What does the magma below indicate about a possible erupt
USGS Scientist-in-Charge of Yellowstone Volcano Observatory, Jake Lowenstern, answers the following questions to explain volcanic eruptions at Yellowstone: When was the last supereruption at Yellowstone?", "Have any eruptions occurred since the last supereruption?", "Is Yellowstone overdue for an eruption?", "What does the magma below indicate about a possible erupt
USGS Scientist-in-Charge of Yellowstone Volcano Observatory, Jake Lowenstern, answers the following questions to explain volcanic features at Yellowstone: "How do we know Yellowstone is a volcano?", "What is a Supervolcano?", "What is a Caldera?","Why are there geysers at Yellowstone?", and "What are the other geologic hazards in Yellowstone?"
USGS Scientist-in-Charge of Yellowstone Volcano Observatory, Jake Lowenstern, answers the following questions to explain volcanic features at Yellowstone: "How do we know Yellowstone is a volcano?", "What is a Supervolcano?", "What is a Caldera?","Why are there geysers at Yellowstone?", and "What are the other geologic hazards in Yellowstone?"
USGS Scientist-in-Charge of Yellowstone Volcano Observatory, Jake Lowenstern, answers the following questions to provide a tour of the Yellowstone Volcano Observatory: "What is YVO?", "How do you monitor volcanic activity at Yellowstone?", "How are satellites used to study deformation?", "Do you monitor geysers or any other aspect of the Park?", "Are earthquakes and
USGS Scientist-in-Charge of Yellowstone Volcano Observatory, Jake Lowenstern, answers the following questions to provide a tour of the Yellowstone Volcano Observatory: "What is YVO?", "How do you monitor volcanic activity at Yellowstone?", "How are satellites used to study deformation?", "Do you monitor geysers or any other aspect of the Park?", "Are earthquakes and