Trip Planner:   USA  /  Wyoming  /  Yellowstone National Park  /  Nature  /  Grand Prismatic Spring
Grand Prismatic Spring, Yellowstone National Park
(4.7/5 based on 1,800+ reviews on the web)
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. Put Grand Prismatic Spring and other Yellowstone National Park attractions into our Yellowstone National Park travel itinerary planner, and watch your holiday take shape.
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Reviews
TripAdvisor
  • The boardwalk walk to the Spring was nice, but with a name like "Prismatic" I was expecting more color. Well worth the walk, though. 
  • Must see of Yellowstone. You will probably have seen it hundreds of times in photographs of the park, but still it is breathtaking when you see it live. Such a colorful place is probably unique in the...  more »
  • I had here myself an awful lot of expected, and with me many others seen the crowds in the parking lot. The Grand Prismatic Spring we have unfortunately very few can see through the heavy mist that blew all from the jump up.
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Google
  • Absolute fantastic. the facilities were great. visit early in the day to get parking and uncrowded view to enjoy the spring. Try to hike the near mountain to get a spectacular view of the spring from top.
  • Another must see. The whole experience builds up to Grand Prismatic as you cross the river and pass several other features, impressive in their own right. But Grand Prismatic lives up to the name. The intensity of the colors is amazing and the size. It feels so otherworldly.
  • The colors in the springs are so beautiful. Love this place. A must see
  • Even the entrance is awe inspiring. You enter via trail head and boardwalk near the river. The closest geyser pours into the river with a white, yellow, and orange colored path. We saw a hawk grab a fish out of the water as we walked up. Boardwalk goes past one big bright blue geyser pool and through tan and grey algae colored ground. Once you get to the Grand Prismatic Spring you realize how BIG it really is. Bright blue, orange, and yellow. Nothing like you've ever seen. Fight your way through the crowd and take pictures with your family. You won't regret it.
  • So beautiful a must see..small parking lot so get there early..some parking on side of road. The pools are gorgeous..if windy hold onto your hat saw quite a few on geysers can't get them....you may fall they and loose limbs or your life. You will not be disappointed..stop in.