Black Dragon's Cauldron

Black Dragon's Cauldron is at the back of the Mud Volcano area of Yellowstone National Park and is reached by a short trail from the parking area. It is a large pot of seething gray mud and is a relatively new feature of the Yellowstone landscape. It first formed in 1948 and has moved south since then about 200 feet (60 meters), a good example of Yellowstone's ever-changing hydrothermal features.

The insets show the lower part of the Mud Volcano area with the trail to this feature leading off into the background, Sour Lake, which is next to Black Dragon's Mouth and which has been affected by its formation, and a feathered spectator photographed nearby,