description Morning Glory Pool Overview
The Morning Glory Pool is a geothermal hot spring within Yellowstone National Park’s Upper Geyser Basin. Its striking yellow color originates from thermophilic bacteria thriving in the consistently heated water. The pool's shape has evolved due to visitor contributions and ongoing geological activity. It is of interest to geologists, biologists studying thermal ecosystems, and visitors observing unique natural formations.
insights Why this score
Morning Glory Pool ranks #10 of 203 in the Hot Spring ranking, behind Dogo Onsen, ahead of Goldbug Hot Springs.
help Morning Glory Pool FAQ
Why does the Morning Glory Pool have unusual yellow and orange tones?
The colors come from thermophilic microorganisms, mainly heat-loving bacteria and algae that thrive in warm water. Their populations vary with water chemistry and temperature.
Where is the Morning Glory Pool located?
It sits in the Upper Geyser Basin of Yellowstone National Park. It is one of the park’s most recognizable geothermal features.
Has the pool shape really changed over time?
Yes, the pool basin has changed due to human activity and periodic deposits around the edges. Yellowstone officials have long documented that visitor access and fallout can alter its color and contour.
What should I avoid when visiting?
Stepping close to the edge or feeding debris can damage the fragile microbial balance. The safest approach is to observe from maintained boardwalks and park overlooks.
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