Bulger Geyser, Natural geyser in Upper Geyser Basin, Yellowstone National Park, US.
Bulger Geyser is a geyser in Yellowstone National Park's Upper Geyser Basin, situated near the Grand Geyser. It produces both brief outbursts and longer eruptions from its thermal vent.
The geyser was documented as part of Yellowstone's thermal system over the past century. Scientific observation has tracked changes in its behavior over time.
Scientists and geologists study Bulger Geyser as part of their research into the patterns and behaviors of thermal features in Yellowstone.
The geyser sits in a thermal area with hot water and steaming surfaces, so staying on marked trails keeps you safe. Early morning visits offer the best viewing conditions with fewer visitors and good lighting.
The geyser's fountain display varies between 1 to 12 feet in height, creating different water patterns during each eruption cycle.
Location: Teton County
Elevation above the sea: 2,235 m
GPS coordinates: 44.46600,-110.83700
Latest update: December 14, 2025 18:13
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