White Dome is a conspicuous cone-type geyser located on the western side of Firehole Lake Drive.

It is easily seen by people waiting for eruptions of nearby Great Fountain Geyser.

Rarely, a minor eruption may occur involving about 10 to 15 seconds of hesitating, moderately low spouting and splashing.

Although it is overshadowed in eruptive height and power by Great Fountain Geyser, White Dome Geyser is a significant feature that was used as an emblem by the old Yellowstone Library and Museum Association, now the Yellowstone Association.

The thermophilic bacterium Thermus aquaticus, important because it produces an enzyme used in polymerase chain reaction laboratory procedures central to modern molecular biology, was first isolated from Mushroom Pool, a non-erupting hot spring a few hundred feet from White Dome Geyser.