Yellowstone National Park photos

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Crested Pool is a blue, superheated pool. Unfortunately, it has claimed a life. It reaches a overflowing boiling state every few minutes, then subsides a bit before building to a boil and overflow again. Upper Geyser Basin, Yellowstone National Park, Wyoming
Old Faithful geyser at sunset, at peak eruption, Upper Geyser Basin, Yellowstone National Park, Wyoming
A crowd enjoys watching Old Faithful geyser at peak eruption, Upper Geyser Basin, Yellowstone National Park, Wyoming
Riverside Geyser at peak eruption, arcing over the Firehole River. Riverside is a very predictable geyser. Its eruptions last 30 minutes, reach heights of 75 feet and are usually spaced about 6 hours apart. Upper Geyser Basin, Yellowstone National Park, Wyoming
A visitor videotapes the eruption of Lion Geyser, with Old Faithful Inn visible in the distance. Lion Geyser, whose eruption is preceded by a release of steam that sounds like a lion roaring, erupts just once or a few times each day, reaching heights of up to 90 feet. Upper Geyser Basin, Yellowstone National Park, Wyoming
Daisy Geyser erupting with visitors visible in the distance.. Daisy Geyser, a cone-type geyser that shoots out of the ground diagonally, is predictable with intervals ranging from 120 to over 200 minutes. It reaches heights of 75 feet, lasts 3 to 4 minutes and rarely erupts in concert with nearby Splendid Geyser. Upper Geyser Basin, Yellowstone National Park, Wyoming
Sawmill Geyser erupting. Sawmill Geyser is a fountain-type geyser and, in some circumstances, can be erupting about one-third of the time up to heights of 35 feet. Upper Geyser Basin, Yellowstone National Park, Wyoming
Castle Geyser erupts, reaching 60 to 90 feet in height and lasting 20 minutes. While Castle Geyser has a 12 foot sinter cone that took 5,000 to 15,000 years to form, it is in fact situated atop geyserite terraces that themselves may have taken 200,000 years to form, making it likely the oldest active geyser in the park. Upper Geyser Basin, Yellowstone National Park, Wyoming
Castle Geyser erupts with the colorful bacteria mats of Tortoise Shell Spring in the foreground. Castle Geyser reaches 60 to 90 feet in height and lasts 20 minutes. While Castle Geyser has a 12 foot sinter cone that took 5,000 to 15,000 years to form, it is in fact situated atop geyserite terraces that themselves may have taken 200,000 years to form, making it likely the oldest active geyser in the park. Upper Geyser Basin, Yellowstone National Park, Wyoming
Grand Geyser erupts (right) with a simultaneous eruption from Vent Geyser (left). Grand Geyser is a fountain-type geyser reaching 200 feet in height and lasting up to 12 minutes. Grand Geyser is considered the tallest predictable geyser in the world, erupting about every 12 hours. It is often accompanied by burst or eruptions from Vent Geyser and Turban Geyser just to its left. Upper Geyser Basin, Yellowstone National Park, Wyoming
Ledge Geyser, vents releasing steam, in the Porcelain Basin area of Norris Geyser Basin, Yellowstone National Park, Wyoming
White Dome Geyser rises to a height of 30 feet or more, and typically erupts with an interval of 15 to 30 minutes. It is located along Firehole Lake Drive, Lower Geyser Basin, Yellowstone National Park, Wyoming
Pink Cone Geyser erupts. Pink Cone Geyser reaches 30 feet in height, and has highly variable interval and duration. It is a cone-type geyser and its cone has a pinkish tint due to manganese oxide in it. Firehole Lake Drive, Lower Geyser Basin, Yellowstone Park, Yellowstone National Park, Wyoming
Grand Prismatic Spring displays a stunning rainbow of colors created by species of thermophilac (heat-loving) bacteria that thrive in narrow temperature ranges. The blue water in the center is too hot to support any bacterial life, while the outer orange rings are the coolest water. Grand Prismatic Spring is the largest spring in the United States and the third-largest in the world. Midway Geyser Basin, Yellowstone National Park, Wyoming
Grand Prismatic Spring displays brilliant colors along its edges, created by species of thermophilac (heat-loving) bacteria that thrive in narrow temperature ranges. The outer orange and red regions are the coolest water in the spring, where the overflow runs off. Midway Geyser Basin, Yellowstone National Park, Wyoming
Grand Prismatic Spring displays brilliant colors along its edges, created by species of thermophilac (heat-loving) bacteria that thrive in narrow temperature ranges. The outer orange and red regions are the coolest water in the spring, where the overflow runs off. Midway Geyser Basin, Yellowstone National Park, Wyoming
Steam rises above the Midway Geyser Basin, largely from Grand Prismatic Spring and Excelsior Geyser. The Firehole River flows by, Yellowstone National Park, Wyoming
Orange Spring Mound. Many years of mineral deposition has built up Orange Spring Mound, part of the Mammoth Hot Springs complex, Yellowstone National Park, Wyoming
New Blue Spring and its travertine terraces, part of the Mammoth Hot Springs complex, Yellowstone National Park, Wyoming
Lamar Valley, summer. The Lamar Valleys rolling hills are home to many large mammals and are often called Americas Serengeti, Yellowstone National Park, Wyoming
Canada geese on the Yellowstone River, Branta canadensis, Yellowstone National Park, Wyoming
Grand Prismatic Spring steams in cold winter air, Midway Geyser Basin, Yellowstone National Park, Wyoming
Bison, Bison bison, Yellowstone National Park, Wyoming
Bison, Bison bison, Yellowstone National Park, Wyoming
Bison, Bison bison, Yellowstone National Park, Wyoming
Bison wades across the Madison River, autumn, Bison bison, Yellowstone National Park, Wyoming
Coyote, Canis latrans, Yellowstone National Park, Wyoming
A coyote hunts for voles in tall grass, autumn, Canis latrans, Yellowstone National Park, Wyoming
Coyote, Canis latrans, Yellowstone National Park, Wyoming
Bull elk in sage brush with large rack of antlers during the fall rut (mating season). This bull elk has sparred with other bulls to establish his harem of females with which he hopes to mate, Cervus canadensis, Mammoth Hot Springs, Yellowstone National Park, Wyoming