Black Dragons Caldron


In 1948, Black Dragon's Caldron burst onto the landscape along a crack in the earth. It uprooted and coated nearby trees in thick mud. This feature has since shifted south 200 feet (60 m) along the crack. The spring feeding nearby Sour Lake was much more active before Black Dragon's Caldron formed. Perhaps underground changes diverted heat energy from Sour Lake to form this seething mass of mud, which a park ranger named for its color and the apparent lashing of the "dragon's tongue."

*Adapted from the NPS Mud Volcano Trail Guide

Feature Type

Not Reported

Inventory ID



Latitude: 44.62019
Longitude: -110.4352
Survey Date: July 24, 1998

Geographic Area: Hayden Valley
Ranger District Contact: Norris District, Al Miller (307) 344-2501

Feature Data

Data Source Supplied By Sample Date Temp Vent Temp pH Cond Extended Data
Park 7/24/1998 51.4°C 0°C 2 8600 µS/cm No
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