Rusty Geyser is located just off the paved area of the Biscuit Basin parking area. It is named after the rust color in the geyserite that has formed around the pool and continues into the outwash channel. The runoff channel is deep and defined by solidified sinter, but eventually fans out and fills with orange thermophiles. A small geyser, eruptions are frequent in the 1–3 minute range and highly visible. Observe safely from the parking lot only!

Rusty Geyser has an average temperate of 193°F (89.4°C), an average pH of 8.5, and an average conductivity of 2127 uS/cm.

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.