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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Tours to Grand Prismatic Spring
Grand Prismatic Spring reviews
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Really enjoyed the geysers. Due to the sleet, ice and snow it was difficult to see the colors of the geyser. The overlook would have helped but it was closed due to the sleet that day. Don't miss... more »
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Take water! It is a little walk yo get there but so worth it. The colors are unlike anything I’ve seen in nature. We took some beautiful pictures. more »
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Absolutely amazing what’s happening to these springs as they are changing every day. Beautiful colors throughout the different springs. No matter where your at you’re going to get an amazing picture..... more »
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Amazing place! One of the world’s largest and deepest hot springs. Beautiful!
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There is a hike to a top overlook that is highly recommend. Wonderful colors. Amazing.
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This is the most beautiful thing I’ve ever seen in nature! Well worth the hike and make sure you hike up the side of the mountain for the overview it’s well worth it!
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Absolutely must-see in you are in Yellowstone. Gorgeous views of the lake and mountains, and also fascinating look at geology.
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An amazing experience!! It is worth your time to take the walkway to this hot spring. However, hold onto your hat!! And prepare yourself for a "steam" bath!! The colors are remarkable!!
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