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 .
Tours to Grand Prismatic Spring
Yellowstone Lower Loop Full-Day Tour BOOK WITH VIATOR FROM $260
Duration: 10 hours
Yellowstone Guided Day Tour From Jackson Hole BOOK WITH VIATOR FROM $379
Duration: 11 hours
Yellowstone Guided Day Tour From Jackson Hole BOOK WITH VIATOR FROM $1,349
Duration: 11 hours
Grand Prismatic Spring Reviews
This is an absolute must if you visit Yellowstone. It does get busy and we had to park some distance way and walk which was no problem to us but might have proved difficult for the elderly or infirm. ... more »
We did the hike to the overlook. The parking was full but we were lucky and only had to wait 5 minutes for someone to come out. The hike is fairly boring alongside a long stretch of road overlooking t... 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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