Bumpass Hell, the largest hydrothermal area at Lassen volcano, located south of Lassen Peak, contains steaming fumaroles and mudpots. It was named after its discoverer, a noted hunter and mountain man who suffered severe burns when he broke through the thin crust of the thermal area.

Copyrighted photo by Katia and Maurice Krafft, 1989.

Copyrighted image used with permission. All Rights Reserved. Contact photographer for any usage requests.

Lassen Volcanic Center