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.
Grand Prismatic Spring reviews
Don’t just stay on the boardwalk! Go further down the road to the Fairy Falls trailhead and see the amazing Grand Prismatic from above to really get the best perspective. It’s a moderate trek and the.... more »
Somehow in my previous 3 trips, I had never been here. On this trip, we hiked the lower trail next to the spring and realized that was not the best view. We could see people on a trail up above... 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.
Plan your trip to Yellowstone National Park
Get a personalized tripA complete day by day itinerary
based on your preferences
Customize itRefine your trip. We'll find the
best routes and schedules
Book itChoose from the best hotels
and activities. Up to 50% off
Manage itEverything in one place.
Everyone on the same page.
Popular things to do in Yellowstone National Park
Nature in Yellowstone National Park
Hidden gems in Yellowstone National Park
Side trips from Yellowstone National Park
Trails in Yellowstone National Park
Trips to Grand Prismatic Spring by other users
11 days in United States BY A USER FROM UNITED STATES Keystone West Glacier Yellowstone National Park 9 days in Yellowstone National Park BY A USER FROM UNITED STATES Gibbon Falls Grand Prismatic Spring Lone Star Geyser 9 days in Redding & Yellowstone National Park BY A USER FROM UNITED STATES Redding Yellowstone National Park 9 days in Montana BY A USER FROM UNITED STATES West Glacier West Yellowstone Gardiner 14 days in United States BY A USER FROM UNITED STATES Thermopolis Denver Yellowstone National Park 22 days in Western US BY A USER FROM UNITED STATES Grand Teton National Park Yellowstone National Park Seattle