At nearly 113 m (370 ft) across and 37 m (121 ft) deep, Grand Prismatic Spring holds the title of the largest hot spring in America and one of the largest in the world. A premier attraction at Yellowstone National Park, the spring's fame traces back to early explorers and fur trappers who first noted it in the early 1800s. The boiling pool constantly steams and bubbles, with its vivid, rainbow-like appearance--the result of pigmented bacteria. To get a close-up view, walk along the park's boardwalk, which leads to a route close to the water's edge. Stay on the path, as the high temperatures of the pool can be dangerous. Plan to visit Grand Prismatic Spring and other customer-reviewed, writer-recommended Yellowstone National Park attractions using our Yellowstone National Park travel route app.
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Grand Prismatic Spring reviews
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Grand Prismatic Springs is one of the most amazing sites in the country. Because of its beauty, it is also very busy. 4 years ago we took the boardwalk out to the springs. This time we decided to...
Grand Prismatic Springs is one of the most amazing sites in the country. Because of its beauty, it is also very busy. 4 years ago we took the boardwalk out to the springs. This time we decided to... more »
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See this from ground level and up above! It was the largest spring we saw on in Yellowstone. Small parking lot so get there early. There is a place to turn off before the spring where you can hike...
See this from ground level and up above! It was the largest spring we saw on in Yellowstone. Small parking lot so get there early. There is a place to turn off before the spring where you can hike... more »
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Never before I’ve seen such colors in nature
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Very beautiful but very crowded on weekend
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