Yellowstone is home to two-thirds of the world’s geysers, attracting visitors from around the world. Most catch Old Faithful and may wander the boardwalks and accidentally witness other eruptions.
Some look at the schedule in the visitor’s office listing the times for the six predictable regular geysers, Great Fountain, Grand, Castle, Daisy and Riverside along with Old Faithful, and plan their day in hopes of catching those in action. But a dedicated few devote weeks, and sometimes entire summers, to waiting, watching and recording eruptions. These are geyser gazers and members of the Geyser Observation and Study Association.