Steaming springs in the Mud Volcano Area

I love the smell of sulphur in the morning

Dragon's Mouth Spring - the steam puffs rhythmically as the water sloshes in and out of the cavern

Hot tubs

Main Terrace at Mammoth Hot Springs

Adam and I did the climb

Mound Terrace

The hot springs deposit calcium carbonate dissolved from limestone to form the terraces

Doublet pool - the water is 90° C

Water violently boiling

The blue coloured water is caused by microorganisms that thrive in the hottest temperatures

Old Faithful erupting, the boiling water goes 30-55m high every 90 minutes or so

At 60m high, Beehive Geyser is taller than Old Faithful, but is irregular and erupts only once or twice daily when active, so we were very lucky to see it in action!

Heart Spring, only just below boiling point

Liberty Pool - the orange colour comes from microorganisms that like slightly less hot water

Lakeshore Geyser in Yellowstone Lake

Impressive colours

Black Pool - named at a time when the water wasn't as hot and the microorganisms made it an inky black

Hot and not quite so hot

Copyright © James Howard 2017