Pioneer Historic Byway
Geyser Park and Visitor Center, ID

Soda Springs has the only captive geyser in the world. It was discovered in an attempt to find a hot water source for a swimming pool. In 1937, the drill broke through and unleased the geyser.

Unlike Old Faithful or many other geysers, this geyser is a cold water geyser. Its power comes from carbon dioxide gas mixing with water in an underground chamber.

The geyser is capped and controlled by a timer. It erupts every hour on the hour in the off-season, though they may adjust it to erupt every half-hour in the regular season. The spout lasts about 10 minutes, and reaches a height of 100 feet year round.