Grand Prismatic Spring, Yellowstone National Park

4.7
#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.
Create an itinerary including Grand Prismatic Spring
© OpenMapTiles © OpenStreetMap contributors

Grand Prismatic Spring reviews

Rate this attraction
TripAdvisor traveler rating
TripAdvisor traveler rating 4.5
3,060 reviews
Google
4.8
TripAdvisor
  • Absolutely beautiful! We hiked the trail to the overlook and the view from above was amazing, 1000 times better than in the boardwalk.  more »
  • When we went in late May, the trail leading to the top was closed and the day was rainy. Could see the steam and the outside and that was about it. Was super excited but turned out to be an ok as...  more »
Google
  • 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.

Plan your trip to Yellowstone National Park

  • Get a personalized trip
    A complete day by day itinerary
    based on your preferences
  • Customize it
    Refine your trip. We'll find the
    best routes and schedules
  • Book it
    Choose from the best hotels
    and activities. Up to 50% off
  • Manage it
    Everything in one place.
    Everyone on the same page.