Take a Whole Pail of Water Just to Cool Him Down
Bumpass Hell
![Steam rises from an area of bare rock set amidst pines, with a bright blue pool.](/images/2015-09-30-lassen/bumpass_hell.jpg)
A fumarole
![Steam rises from a promient outcropping.](/images/2015-09-30-lassen/steaming_fumarole.jpg)
A boiling hydrothermal pool
![A blue pool before a hill of steaming white stones and a background of pines.](/images/2015-09-30-lassen/hydrothermal_pool.jpg)
Opaque, gray water trickles between rocks away from the boiling pool.
![Opaque, gray water trickles between rocks.](/images/2015-09-30-lassen/acidic_muddy_water.jpg)
The yellow specks are sulfur, deposited from the volcanic water.
![A closeup of the opaque gray water and yellow sulfur deposits.](/images/2015-09-30-lassen/sulfur_deposits.jpg)
A mudpot springs and boils.
![Gray and white dirt surrounds a boiling yellow pool.](/images/2015-09-30-lassen/mudpot.jpg)
A boiling pool.
![The reflections of gray and yellowed stones are reflected in an aqua pool.](/images/2015-09-30-lassen/boiling_pool.jpg)
![An aqua, boiling pool in front of a rocky landscape with pines.](/images/2015-09-30-lassen/pool.jpg)
![A small trickle of gray water flows on beige and yellowed dirt away from a steaming pool.](/images/2015-09-30-lassen/landscape.jpg)
Bumpass Hell, Lassen Volcanic National Park