Grand Prismatic Spring, Yellowstone National Park

#3 of 82 in Parks in Yellowstone National Park
Hot Spring · Nature / Park
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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TripAdvisor traveler rating 4.5
3,109 reviews
  • Going down to the spring and walking the boardwalk is a must, but I think the hike up to the overlook was great and the view was amazing. Continue to the falls on the hike for an awesome set of...  more »
  • I visited Grand Prismatic Spring around noon. The place was slammed and I had to wait in line for about 30 min to get a parking spot in the lot. The views of the spring from the boardwalk are good...  more »
  • Amazing place! One of the world’s largest and deepest hot springs. Beautiful!
  • There is a hike to a top overlook that is highly recommend. Wonderful colors. Amazing.

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