The continuous Fly Geyser of Fly Ranch is on private land in Nevada and began during 1916 when a water well drilling operation accidentally penetrated a geothermal source.
Fly Geyser, also known as Fly Ranch Geyser is a small geothermal geyser that is located approximately 20 miles (32 km) north of Gerlach, in Washoe County, Nevada. The Geyser is located in Hualapai Flat, about 1/3 of a mile from State Route 34. It is large enough to be seen from the road.
Fly Geyser is a little-known tourist attraction, even to Nevada residents. It is located near the edge of Fly Reservoir and is only about 5 feet (1.5 m) high, (12 feet (3.7 m) counting the mound on which it sits). The water well functioned normally for several decades, but in the 1960s geothermally heated water found a weak spot in the wall and began escaping to the surface. Dissolved minerals started rising and accumulating, creating the mount on which the geyser sits, which continues growing. Today water is constantly spewing, reaching 5 feet (1.5 m) in the air. The geyser contains several terraces discharging water into 30 to 40 pools over an area of 30 hectares (74 acres). The geyser is made up of a series of different minerals, which gives it its magnificent coloration.
There are two additional geysers in the area that were created in a way similar to Fly Geyser. The first geyser is approximately three feet high and is shaped like a miniature volcano. The second geyser is cone-shaped and is of the same approximate size as Fly Geyser. Like Fly Geyser, these geysers are continually growing.