Elevation: 7,356 ft.
Doublet Pool is a hot spring in the Upper Geyser Basin of Yellowstone National Park, Wyoming.
Doublet Pool is 8 feet (2.4 m) deep and its temperature is approximately 194.4 °F (90.2 °C). Its scalloped edge is made of geyserite. Although geysers rarely occur in Doublet Pool, only two or three have been seen; the pool on the right pulses over the vents about every two hours. Sometimes, there will be vibrations, surface wave motion, and thumping; these are probably caused by collapsing gas and steam bubbles deep underground.