Imagine walking on a densely forested trail to arrive at Mud Geyser – a trail once shaded by trees now criss-crossing the ground around you. Before 1978, Mud Geyser was hidden by forest except from a platform beyond this point! A Once and . . . — — Map (db m88686) HM
Explosive Change In 1870, explorers stood in awe as Mud Volcano spewed mud into the treetops, shaking the ground with each eruption. Two years later it was a pool of bubbling, muddy water. Mud Volcano has blown itself apart!While returning by a . . . — — Map (db m46272) HM
Beautiful and Bizarre
As you walk through Norris Geyser Basin, you may feel as if you are encountering another world. In the basin—far below the towering peaks of the Gallatin Mountains—water accumulates underground. Heated . . . — — Map (db m45316) HM
In this raw, acidic land where iron and arsenic abound, thermophiles and extremophiles – microorganisms that live in heat and other extremes – inhabit geysers and hot springs. Many pools are opalescent, or cloudy. Look for murky . . . — — Map (db m88437) HM
The sweeping view before you is named for its porcelain-like appearance – smooth sinter deposited by centuries of thermal activity, continually glazed by minerals, hot water, and living microorganisms called thermophiles. Norris Note • . . . — — Map (db m88439) HM
Deep Origins 1. Yellowstone’s volcano heats water deep underground. 2. Under great pressure, the water percolates upward through buried limestone, dissolving a mineral called calcium carbonate. 3. Above ground, the water begins to cool . . . — — Map (db m88452) HM
The cliff in front of you shows a flood of lava in cross-section. It may be difficult to imagine the forested Yellowstone Plateau covered with bubbling, hissing lava, but the rocks contain the evidence. Up close, you can see that the dark rhyolite . . . — — Map (db m88409) HM
The milky color of the mineral deposited here inspired the naming of Porcelain Basin and Porcelain Springs. The mineral, siliceous sinter, is brought to the surface by hot water and forms a sinter “sheet” over this flat area as the . . . — — Map (db m88436) HM
The upended rocks before you are the result of Porkchop Geyser’s hydrothermal explosion in 1989. Porkchop’s vent failed to relieve a surge in underground pressure; it exploded creating another chapter in the geyser’s dramatic history of change. . . . — — Map (db m88410) HM
Shaped like a porkchop, this quiet spring was named “Dr. Morey’s Porkchop” in 1961. But this calm spring held many surprise, beginning with an eruption in 1971. For the next 14 years, Porkchop occasionally erupted through its tiny . . . — — Map (db m88411) HM
Across the Firehole River is Riverside Geyser, one of the most predictable and consistent geysers in Yellowstone. Beginning an hour or two before an eruption, water pours over the cone’s edge, and splashing and bubbling become more visible. Then, . . . — — Map (db m88386) HM
Before the earthquake on June 30, 1975, the observation platform extended one hundred feet farther into the canyon. The main tremor and numerous aftershocks measuring 6.1 on the Richter scale shattered a portion of this cliff, tumbling it into the . . . — — Map (db m45302) HM
This hillside is venting. As sulfuric acid, gasses, and steam escape, they create a barren and very dangerous landscape called a solfatara: scalding mud and steam are often barely covered by hot, crumbling, decomposed rock. Unlike other . . . — — Map (db m88435) HM
When Steamboat Geyser erupts, it can rocket a column of scalding water 90-120 meters into the air – two to three times the average height of Old Faithful. Steam roars for twenty-four hours after. Odds are against your witnessing this drama, . . . — — Map (db m88323) HM
The Grand Canyon of the Yellowstone River slices through an ancient hydrothermal basin. The basin developed in rhyolitic lava and ash that flowed into the Yellowstone Caldera about 500,000 years ago. The river carved this spectacular canyon through . . . — — Map (db m88959) HM
Ten times more acidic than lemon juice, Sulphur Caldron sits on the edge of one of the most active areas of Yellowstone's buried volcano. Sulphur-rich gasses rise furiously here, filling Sulphur Caldron with sulfuric acid. Incredibly, this muddy . . . — — Map (db m46268) HM
The canyon varies from 800 to 1200 feet in depth
and from 1500 to 4000 feet in width. Its length is about 24 miles. The upper 2½ miles is the most colorful section. Hot spring activity has continued through the ages altering the lava rock to . . . — — Map (db m41398) HM
The canyon varies from 800 to 1200 feet in depth and from 1500 to 4000 feet in width. Its length is about 24 miles. The upper 2½ miles is the most colorful section. Hot spring activity has continued through the ages altering the lava rock to . . . — — Map (db m45299) HM
The rocky outcropping in front of you tells part of a violent story of Yellowstone’s volcano – one of the largest volcanoes on Earth. About two million years ago Yellowstone’s volcano – so enormous that it is called a “super . . . — — Map (db m88930) HM
Norris Geyser Basin
You are close to a world of heat and gases where microorganisms live in such massive numbers they add color to the landscape. This strange, beautiful place is on the edge of a giant volcano-the Yellowstone Volcano-one of . . . — — Map (db m45349) HM
Tower Fall is the story of two rocks: easily eroded rocks and rocks that are resistant to erosion. Rock at the brink and underlying the waterfall is a hard volcanic rock. Erosion at the base of the fall causes the upstream migration of the fall. . . . — — Map (db m88305) HM
Roots of Survival The secret of an aspen grove lies hidden beneath the ground. Aspens rarely grow from seeds but spring up abundantly from the roots of their parent. These young shoots are connected to each other underground by an extensive . . . — — Map (db m88920) HM
Welcome to Uncle Tom’s Point
Uncle Tom’s Trail
For a memorable descent into the canyon, follow Uncle Tom’s Trail. From there, you can sense the power of Lower Falls as the Yellowstone River thunders over the brink, . . . — — Map (db m45272) HM
A waterfall is a clue that you are standing on a geologic crossroads.
A waterfall forms in a river channel where harder rocks meet softer rocks that erode more easily and quickly. Here, volcanic and hydrothermal activity have created the . . . — — Map (db m45275) HM
You are inside a caldera of one of the largest volcanoes in the world! The volcano has erupted at least three times, and Yellowstone is full of signs that volcanic activity is still very much alive below ground.On the Rise Magma is moving and . . . — — Map (db m46265) HM
The high cliffs around you were created after the last volcanic eruption in the Yellowstone region, about 630,000 years ago. The powerful eruption ejected ash as far away as Nebraska and Texas, expelling magma from an underground chamber more than . . . — — Map (db m88343) HM
Here the Yellowstone River plunges 308 feet over the Lower Falls. Hot springs have weakened the rock jut downstream, where you might see several geysers spouting into the river. As falling water pounds the thermally softened rock, it continues to . . . — — Map (db m45297) HM
Flowers are scattered throughout Yellowstone’s northern landscape from April through September. During winter they lie dormant, waiting to burst into color. Several factors determine what you might see, and where. • How hot or cold has it been . . . — — Map (db m88926) HM
White Dome Geyser’s beautifully shaped cone is many centuries old, and is still growing with each eruption. For hundreds of years, thermal water has been building the cone that you see today – one of the largest in Yellowstone. Formation of . . . — — Map (db m88390) HM
The sight points to Laramie Peak, altitude 10,247 feet, the highest elevation in the Laramie Range. These mountains were originally called the Black Hills, a name derived from the dark appearance of their evergreen forests as noted from far to the . . . — — Map (db m86943) HM
As you journey through Wyoming, you are one of the countless travelers who has looked out to the west and seen the granite rising of Laramie Peak. Near Scottsbluff, Nebraska, approximately 80 miles east of Dwyer Junction, emigrants witnessed their . . . — — Map (db m98380) HM
In the process of uplift, which created the Big Horn Mountains, faults and fractures formed in the rocks. The thick layers of limestone in this area were fractured parallel to the valley. When a section of the Earth’s crust sank, huge chunks broke . . . — — Map (db m88164) HM
About 500 million years ago the air and land were warmer, and seas covered all of Wyoming including the area you see. You would not recognize any animal life at that time. None of it lived on the land. Then around 75 million years ago, the earth’s . . . — — Map (db m88162) HM
Across the road is a thrust fault / syncline formation, exposed by the road cut. The fault occurred when pressure caused the rock layers to push up creating the non-conforming layers and downward fold (syncline). The Big Horn Mountains reached . . . — — Map (db m88160) HM
The abundance of Rocky Mountain bighorn sheep led the Indians to name this mountain range after these majestic animals. The Big Horn Mountains are a wildlife viewing paradise. Several native Indian tribes competed with each other and later with . . . — — Map (db m89010) HM
(Two panels make up this marker)
The Wind River Mountains form the Continental Divide, with water flowing into three watersheds: the Columbia, Colorado, and Missouri Rivers. Rocks in these mountains are over one billion years old, . . . — — Map (db m180308) HM
The towers you see here are the remains of a complex system of sand filled channels of ancient Lake Gosiute. The sandstone promontories of the Laney Member of the Green River Formation were deposited during the middle Eocene Epoch from about 40 to . . . — — Map (db m90094) HM
Named in honor of Edward Deen Eskridge 16, who was lost on Feb. 15, 1963 after a car accident that fatally injured his brother Richard, 15. His last tracks were found about 3 miles down this draw.
This tragedy inspired the founding of the . . . — — Map (db m90798) HM
About three million years ago, a volcano dominated the landscape east of U.S. 191. The powerful forces of wind and water eroded softer rocks surrounding the volcano's more resistant core, resulting in the tooth-shaped butte on the eastern horizon. . . . — — Map (db m47139) HM
Running water initially cut V-shaped canyons throughout the range. Mountain glaciers later filled these canyons. Rocks of all sizes, falling onto and plucked by these glaciers, enhanced their grinding power. The broad U-shape of Cascade Canyon . . . — — Map (db m123284) HM
Pool constructed in 1933 by Civilian Conservation Corps (CCC)
Average Yearly Snowfall 400"
Elevation 6987
Water Temp. Summer 93, Winter 112 — — Map (db m62281) HM
Discover the magnificent landscape and wild communities of Grand Teton National Park. Here the Teton Range rises abruptly from the high mountain valley known as Jackson Hole. From bare alpine rocks to lush meadows and floodplains, the national park . . . — — Map (db m88203) HM
You are standing within the Greater Yellowstone Ecosystem, the largest nearly intact natural area remaining in the contiguous United States. Grand Teton and Yellowstone national parks, seven national forests, and two national wildlife refuges . . . — — Map (db m88202) HM
Many natural features in this region went without names until the 1800s. The Shoshone called the mountain range “Teewinot,” meaning “many pinnacles.” French Canadian trappers referred to the Grand, Middle, and South Teton as . . . — — Map (db m88277) HM
The pursuit of wild places and naturally occurring wild things brings people from all over the world to northwest Wyoming. Jackson Hole lies within the Greater Yellowstone Ecosystem (GYE) which is one of the largest natural ecosystems remaining in . . . — — Map (db m89003) HM
Jagged peaks tower above Cascade Canyon reminding us that powerful Pleistocene glaciers carved this canyon and sculpted this range. From the shores of Jenny Lake, venture through forest communities, wetlands along Cascade Creek, high meadows filled . . . — — Map (db m88293) HM
Two of the most powerful forces in nature created these unique boulders. Millions of years ago, lava filled with gas bubbles erupted, cooled, and crystallized. Later Ice-Age glaciers carried rocks south from the Yellowstone plateau into today’s . . . — — Map (db m88198) HM
Geology shapes the ecosystem. Jagged mountains harbor the alpine community and glacial outwash plains support the sagebrush community. Beginning two million years ago, ice-aged glaciers repeatedly covered this landscape carving valley lakes, . . . — — Map (db m88713) HM
The Teton Range towers over Jackson Hole. Powerful geologic forces began stretching this area less than 10 million years ago cracking the Earth’s crust to form the 40-mile long Teton fault. Movement on this fault generates massive earthquakes up to . . . — — Map (db m88711) HM
In the past 40 years the Teton, Teepee, and Middle Teton glaciers on the peaks in front of you have lost 25 percent of their total surface area. Glaciers show us that our climate changes. They serve as icy reservoirs, accumulating snow and ice . . . — — Map (db m88088) HM
Alterations to a natural lake Jackson Lake is the largest of the park’s many lakes formed by glaciers. The lake expanded when the Bureau of Reclamation built a dam in 1907, creating a reservoir on top of a natural lake. The water behind the dam . . . — — Map (db m89500) HM
Measuring the Rise of the Range A fault scarp provides visual evidence of displacement of adjoining blocks of the earth's crust along a fault. near the base of Rockchuck Peak, the scarp shows nearly 60 feet of movement, mostly in the . . . — — Map (db m46368) HM
Mt. Moran reflects all the geologic forces shaping the Teton Range. Formed of a massive block of metamorphic gneiss; cut by dikes of igneous granite and diabase; capped by sedimentary sandstone; and flanked by glaciers, this formidable peak . . . — — Map (db m88207) HM
Curious depressions known as “Potholes,” dimple the glacial outwash plain here. Some 15,000 years ago, sediment carried by glacial meltwater buried huge blocks of ice that calved off retreating glaciers. As the ice melted, the ground . . . — — Map (db m88222) HM
Looking west toward Mount St. John, notice the steep slope or fault scarp near the base of the peak. This steep slope formed as several massive earthquakes broke the ground by more than 75 feet since the ice-aged glaciers last retreated 14,000 . . . — — Map (db m88228) HM
A landscape built up by earthquakes The spectacular Teton Range began to rise around ten million years ago when movement on the Teton fault generated a series of massive earthquakes. The block of bedrock west of the fault rotated skyward to . . . — — Map (db m89499) HM
“These peaks have been called the Cathedral Group . . . more evident here than in many of the great cathedrals of men is the gothic note. It is seen in the profiles of the countless firs and spruces congregated like worshippers on the . . . — — Map (db m88229) HM
You are perched on one of the most geographically significant lines in North America -- the Great Divide, sometimes called the Continental Divide. This line of high terrain at the crest of the continent forms the boundary between two great . . . — — Map (db m96372) HM
Young, Restless, and Still Rising In geologic time, these mountains are the energetic teenagers of the Rocky Mountain chain, active, growing, yet sculpted by erosion.The Rise of the Range Nine million years ago, the earth's crust broke into . . . — — Map (db m46278) HM
From this vantage point, notice how the landscape spreads before you. Geology controls the park’s natural communities from valley wetlands to the mountain alpine. Ice-age glaciers periodically blanketed this landscape last retreating 14,000 years . . . — — Map (db m88287) HM
Imagine the Teton Range and the valley in front of you like two parts of a giant hinge. The Earth’s crust stretches and breaks into two blocks along the 40-mile-long Teton fault. Fractures generate large earthquakes along the fault. The western . . . — — Map (db m169600) HM
Red Spouter
As you stand here, imagine traveling back in time to August 17, 1959. You would find yourself on a grassy knoll. Red Spouter did not exist!
Shortly before midnight, a major earthquake rocked Hebgen Lake, Montana, . . . — — Map (db m45373) HM
In the 1880s Excelsior Geyser erupted in bursts 50 to 300 feet high. The thermal violence formed the jagged crater and apparently ruptured the geyser’s underground system, causing eruptions to cease after 1890.
On September 14, 1985, Excelsior . . . — — Map (db m45329) HM
Making Mud
This vat of bubbling mud contains the perfect mix of ingredients to create mudpots: heat, gases, rock, minerals, acid, and even living microorganisms!
Heat-loving “thermophiles” consume some of the gases and . . . — — Map (db m45358) HM
Making Mud
This vat of bubbling mud contains the perfect mix of ingredients to create mudpots: heat, gases, rock, minerals, acid, and even living microorganisms!
Heat-loving “thermophiles” consume some of the gases and . . . — — Map (db m45362) HM
Grand Prismatic Spring is the largest and one of the most brilliant of Yellowstone’s many colorful hot springs. It massive expanse stretches approximately 200 feet (61m) across. The high temperature of its water—°160 (70°C)—ensures that . . . — — Map (db m45339) HM
The Black Hills, named after the dark green carpets of pines that cover the hills, are a geological wonder. Covering some 125 miles north to south and 65 miles east to west, the Hills rise 3,000 to 4,000 feet above the red valley floor. Below you . . . — — Map (db m98171) HM
You are amidst a stand of ponderosa pines. These majestic trees which can reach heights of 180 feet provided a variety of habitats for wildlife.
Porcupines, pygmy nuthatches, red squirrels and mule deer inhabit ponderosa pine forested. Porcupines . . . — — Map (db m98247) HM
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