Geysers and Hot Springs

No one back home is going to believe the wild and wonderful geologic features of Yellowstone Country. Get ready for geysers that shoot high in the air, crusty, hot springs in wild colors, and bubbling pots of mud in this geological wonderland. In fact, 60% of the world's geysers and hot springs are inside Yellowstone National Park.

Yellowstone's most famous geyser, Old Faithful at Twilight

8 Best Yellowstone Geyser Basins and Map

A map showing Yellowstone's geyser basins including the Upper Geyser Basin with Old Faithful and Morning Glory Pool, and nearby Grand Prismatic.

Yellowstone Old Faithful Geyser

About Old Faithful, Yellowstone's Famous Geyser

Watch Old Faithful erupt and and explore exciting FAQs about Yellowstone's most famous geyser.

Yellowstone Bacteria and Beer

Beer, Science, and Yellowstone Geysers

Brewers use Yellowstone organisms for quality testing beer.

Grand Prismatic in Yellowstone National Park

Deaths and Injuries at Yellowstone's Geysers and Hot Springs

The extraordinary natural features that keep Yellowstone such an alluring place can make it perilous.

Emerald Spring in the Norris Back Geyser Basin. Photo by Gloria Wadzinski

Extreme Geysers in Yellowstone's Norris Back Basin

At the Norris Back Geyser Basin, you'll see a land of extremes... the tallest, but infrequent geyser, geysers that erupt continuously, springs that have been damaged by man, new geysers, old geysers, and exploding geysers.

Steamboat Geyser in the Norris Geyser Basin

Geothermal Features Constantly Changing in Yellowstone

With a jet engine roar and a mighty burst of steam and water, a large geyser that hadn't erupted since 1998 surprised two hikers near the edge of Norris Geyser Basin in early June, 2008.

Castle Geyser in the Upper Geyser Basin. Photo by Jeff Vanuga

Geyser Gazers Perform Vital Service for Science

There is no cure, but treatment can consist of regular visits to geysers, or becoming a member of the Geyser Observation and Study Association (GOSA), a citizen-science group of 300 members.

Artists' Paintpots. Photo by Gloria Wadzinski

Geysers & Hot Springs look like Pastel Artists' Paintpots

At Yellowstone's Artists' Paintpots, you see pastel-colored mud and springs, bubbling and gurgling under a blanket of steam.

The Grand Prismatic Pool in Yellowstone's Midway Geyser Basin.

Grand Prismatic Spring at Yellowstone's Midway Geyser Basin

This spring is remarkable for two reasons. Its size: the world’s third-largest, and its colors: bands of orange, yellow, and green ring the deep blue waters

Man on a Yellowstone boardwalk in front of a hot springs

Has Anyone Ever Fallen into a Geyser?

Visitors have in the past slipped and fallen into hot springs, or were severely injured with burns from erupting geysers, but it is extremely rare.

Old Faithful at Sunset

How Can I Avoid the Crowds at Old Faithful?

Every year, Yellowstone draws in nearly three million visitors—most of them eager to see Old Faithful. The busy days of June through September.

Mammoth Hot Springs in Yellowstone

Mammoth Hot Springs Looks Like an Inside-Out Cave

About 50 hot springs and colorful limestone terraces lie within the area of Yellowstone known as Mammoth Hot Springs. Drive to this geyser basin year-round.

Norris Porcelain Basin. Photo by Jeff Vanuga

Norris Geyser Basin - Yellowstone's Hottest, Oldest, Tallest

Norris holds the record for the highest temperature ever recorded in Yellowstone. It has the tallest geyser in the world, and the colors too impress with milky blues, greens, and yellows.

Norris Porcelain Geyser Basin. Photo by Gloria Wadzinski

Norris Porcelain Geyser Basin's Milky Colors

Porcelain Basin is named due to the milky color of the mineral deposited here. That whitish-colored mineral is siliceous sinter, also known as geyserite.

yellowstone-geysers-hot-springs-sagan

Rare Microbes Flourish in Yellowstone National Park Geysers and Hot Springs

The Thermal Biology Institute at Montana State University studies life forms and microbes found in the hot springs and geysers of Yellowstone National Park.

Aerial view of Upper Geyser Basin. Photo by NPS Jim Peaco

Researchers Take Calculated Risks Around Hazards

Tourists are most likely to get burned in Yellowstone's thermal areas when they stray off marked trails and boardwalks. But Yellowstone's geologists and other scientists also try to stay acutely alert to the dangers that lurk in the geysers, hot springs, and steam vents.

Yellowstone Old Faithful Geyser

See Old Faithful and 60% of the World's Geysers in Yellowstone's Upper Geyser Basin

See Old Faithful, Castle Geyser, Riverside Geyser and geothermal features of Yellowstone country's steaming vents, erupting geysers and gurgling hot springs.

Steamboat Geyser in Norris Geyser Basin

See the World’s Tallest Geyser...If You’re Lucky

Old Faithful’s predictability is the exception; most geysers give little warning when they’re about to blow. The result, of course, is a surprise steam-and-water show. And in the case of Steamboat Geyser, there’s no other show like it Earth.

Steamboat Geyser May-23, 2005

Steamboat, World's Tallest Geyser, Erupts Unexpectedly in Yellowstone

Saturday, May 5, 2018, marked the fifth time in seven weeks that the unpredictable Steamboat Geyser has erupted.

A woman viewing Morning Glory Pool from the boardwalk

Things Stuffed Down Yellowstone's Geysers

From laundry to couches, soap to horseshoes, Old Faithful and neighboring Yellowstone geysers and hot springs have been a receptacle for more than just water since the park's inception. The latest has been a drone that dived into the Grand Prismatic Hot Spring

Giantess Geyser

This is Yellowstone: Giantess Geyser

An infrequent, but violent Yellowstone geyser recently erupted after its longest period of known dormancy.

Imaging of Morning Glory Pool comparing heat affecting color change. (Photo : Nugent, Shaw, and Vollmer)

Vandals Change Color of Geysers

New study reports that as a result of coins, trash, and rocks thrown into the pool over time, the pool's temperature is cooler altering the color

Yellowstone-Geysers

Watch Geysers Erupt in Yellowstone

Yellowstone is the largest active geyser field in the world.

Test tube geyser from YouTube video

Why Do Geysers Erupt?

Watch a video showing a test tube "geyser" with clear looping chambers underneath. It slowly bubbles until the pressure is reached, creating a blast.

Steamboat Geyser in Norris Geyser Basin

Yellowstone Geyser Trivia

Steamboat Geyser in Norris Geyser Basin. No one can predict when it's going to erupt, as it works on an odd schdeule, ranging from four days to fifty years.