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Grand Prismatic Spring, Yellowstone National Park

4.7

#3 of 85 in Parks in Yellowstone National Park

Hot Spring Nature / Park

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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

2,962 reviews

Google

4.8

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4.9

1 likes

• By JenniferandAlan

  Midway geyser basin is my favorite geyser basin. Excelsior Geyser is so blue and jaw droppingly large but Grand Prismatic, the largest hot spring, is the real crowd pleaser. The center is a deep...  more »

• By awanderfulplan

  Located between Old Faithful and Madison is an .8 mile boardwalk takes you up close and personal to the Grand Prismatic Spring and other geyser attractions! Fairy Falls Trail, a 1 mile hike to an...  more »

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Google

• By Joanna Żak

  Amazing place! One of the world’s largest and deepest hot springs. Beautiful!

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• By Steven Flores

  There is a hike to a top overlook that is highly recommend. Wonderful colors. Amazing.

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