Bulger Spring

Bulger Spring is a small geyser that is located between the Sawmill Geyser Complex and the Grand Geyser Complex (Upper Geyser Basin). It is unclear which group this geyser is most closely related to, as the plumbing in this area is so complicated.

Eruption Pattern
Bulger Spring exhibits both major and minor eruptions, with minor eruptions being more frequent. In both cases, bursts reach about 6 ft. Minor eruptions can last only seconds, and produce little or no runoff away from the geyser's cone. Major eruptions can last up to 12 minutes and produce significant runoff.

History
"Bulger" was a name given to a number of small geysers and spouters by the 1870 geological survey, implying that this geyser was active at that point. It was apparently active into the 1890s.

Previous to the 1959 earthquake, very little activity was recorded.

In 2011, Bulger's Hole appeared and erupted a few times during Bulger's major eruptions.