The most famous hydrothermal feature at West Thumb is a geyser on the lake shore known as Fishing Cone. Fishing Cone erupted frequently to the height of 12 m (40 feet) in 1919 and to lesser heights in 1939. As the water level in Yellowstone Lake has increased, the cone is now inundated during the spring and the temperatures in the cone have cooled enough that it no longer erupts and is now considered a hot spring. The name Fishing Cone can be traced back to tales told by mountain men of a lake where one could catch a fish, immediately dunk it into the hot spring, and cook it on the hook.