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West Yellowstone, Montana
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Sentinel Geyser is located in the Yellowstone National Park, which is home to the largest concentration of geysers in the world, including the famous Old Faithful.
Geysers in Yellowstone, including Sentinel, can reach temperatures of up to 204°F (95.5°C) just before they erupt.
The geothermal features of Yellowstone, including Sentinel Geyser, are part of the Greater Yellowstone Ecosystem, one of the largest nearly intact temperate-zone ecosystems on Earth.
Thermophilic bacteria thrive in the hot waters of geysers like Sentinel, giving the surrounding areas their vibrant colors.
The Yellowstone Volcano Observatory keeps a close watch on geothermal features like Sentinel Geyser to study volcanic activity and ensure public safety.
