Blood Geyser is a geyser with an average temperate of 196.7°F (91.5°C), an average pH of 8.5, and an average conductivity of 2100 uS/cm. Blood Geyser has steady activity, perpetually spouting from a pool about 13x10 feet (4x3 m) in size. It is a distinct orange-red color with abundant sinter surrounding the pool. Grass grows around the perimeter. Blood Geyser is set in a hillside and has runoff channel to the north.

Geysers

Geysers have constrictions in their plumbing systems that prevent water from moving freely to the surface where heat would escape. Water beneath the constrictions creates a buildup of steam. Eventually the steam pushes water past the constrictions and the geyser erupts.

Use Caution in Hydrothermal Areas

• Stay on boardwalks and designated trails.
• Hydrothermal water can severely burn you.
• Never run, push, or shove.
• Supervise children at all times.
• Do not scratch hydrothermal mats.

You are responsible for your safety.

Think safety, act safely. Yellowstone is a dangerous place.