The Blue Dragon lava flow covers about 280 km² of Craters of the Moon lava field with flat-lying pahoehoe lava. The 3.4 cu km flow, erupted about 2075 years ago, is the largest in the Craters of the Moon volcanic field. It traveled up to 25 km to the east and 15 km to the SW from fissure vents near the center of this photo. The largely pahoehoe lava flow is named for a characteristic iridescent dark- to light-blue, glassy crust.

Photo by Lee Siebert. 1994 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Craters of the Moon