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Old Faithful is the most famous geyser located in Yellowstone National Park. It is named Old Faithful due to its consistent eruption times, which is roughly about every 65 or 91 minutes. We had been so busy hiking around Yellowstone National Park during one trip that we had forgotten to visit Old Faithful. On the way back to our campsite we made one last ditch effort to see it. We were treated to a beautiful, vibrant sunset in the background of the famous geyser. It was a very tricky photograph to properly expose, but it offers a glimpse of Old Faithful after most of the crowds have gone home.
Yellowstone National Park is famous for its fascinating hydrothermal and geological features such as geysers, hot springs, mudpots and fumaroles. Yellowstone became the world’s first national park on March 1, 1872, in efforts to preserve these important natural wonders.
Yellowstone is a gigantic volcanic caldera (a large volcanic crater that is formed by a gigantic eruption that results in the collapse of the mouth of the volcano). Magma comes relatively near the Earth’s surface at Yellowstone, and the heat from it drives the hydrothermal activity. More than half of the world’s total active geysers are found within Yellowstone, as well as 10,000 other hydrothermal features.
Some of Yellowstone’s best-known features include Old Faithful Geyser, Mammoth Hot Spring, Grand Prismatic Spring and Yellowstone Falls, which forms the “Grand Canyon of The Yellowstone”. Interestingly, Yellowstone is also home to the largest concentration of mammals in the contiguous (lower 48) states, including bison, elk, bighorn sheep, grizzly bears, mountain lions, pronghorn and wolves.