Pumpkin Spring
- Location
- Arizona, United States
- Water type
- acidic
- Temperature
- 35 °C
- pH
- 7
Water profile
Soothing — neither hot nor cold, perfect balance.
Rich in trace elements — gentle on the skin.
Soft water — natural, classic buoyancy.
Pumpkin Spring is a visually striking but extremely dangerous natural geothermal pool on the Colorado River in the Grand Canyon, where arsenic-rich water has deposited a bright orange travertine mound overhanging the river, creating one of the most memorable and hazardous natural hot springs in North America. The pool's vivid colour and dramatic setting on the canyon wall make it a famous landmark for Grand Canyon river rafting trips, but its waters are toxic due to extreme arsenic concentration. The extraordinary geological context of the Grand Canyon, with its two-billion-year rock record and one-mile vertical walls, makes Pumpkin Spring part of one of the most geologically awe-inspiring landscapes on Earth.