The Sulphur Caldron in Yellowstone National Park is one of the park’s most acid hot springs, with yellow and turbulent waters reminding one of an evil witch’s brew.
What can I see and do at the Sulphur Caldron?
- Sulphur Caldron: The Sulphur Caldron is almost as acidic as battery acid, but is a pool of life all the same. Bacteria live within the ultra-hot waters, creating the colors you see. Temperatures in the Sulphur Caldron at Yellowstone are about 190 degrees F.
- Mud Volcano: Mud Volcano and Dragon's Mouth Spring are located right across the road and well worth a visit.
Directions to Sulphur Caldron
The Sulphur Caldron is just north of the Mud Volcano on Grand Loop Road, about 4.5 miles north of Fishing Bridge on the Park Loop Road.