Brilliant Pool, Hot spring in Yellowstone region, Teton County, US.
Brilliant Pool is a hot spring in the Yellowstone geothermal area with vivid blue water colored by minerals and heat-loving bacteria. The spring sits among other thermal features where hot gases and steam continuously rise from underground, keeping the water temperature elevated year-round.
The hot spring formed thousands of years ago through intense volcanic activity and underground magma movement that shaped the Yellowstone landscape. The geothermal area evolved over time as fractures and cracks in the rock created new paths for heated water to surface.
Native American tribes of the region incorporated the surrounding thermal springs into their traditions for generations, using them for ceremonies and daily needs.
Visitors should always stay on designated paths and keep safe distances from the pool since the water is extremely hot and can cause serious injury. Wear sturdy shoes and watch your footing, especially on wet or icy ground, as the boardwalks can become slippery throughout the year.
The color of the pool shifts throughout the day as sunlight hits the water from different angles and passes through the mineral and bacteria-rich waters. These color changes occur regularly, making the spring feel completely different depending on the time of day you visit.
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