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
Full-Day Yellowstone National Park Private Tour by Luxury Car BOOK WITH VIATOR FROM $437
Duration: 12 hours
Private Yellowstone Geology Tour with Wildlife, Hiking, and Geysers and Lunch BOOK WITH VIATOR FROM $1,030
Duration: 5 hours 30 minutes
Grand Prismatic Spring reviews
I don't know where people go to get these overhead views of the spring. We only found the trail that goes along the surface. You don't get the best view of the colors but it is still very cool and... more »
First off: this place is drop-dead beautiful. The springs are lovely - when you can see them. We saw the edges of all of them, due to it being a bad-weather day. The steam hung right on top of Grand..... 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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