Bumpass Hell - Lassen Volcanic National Park

Bumpass Hell is a hydrothermally altered geothermal area that spans 16 acres and has hot springs, fumaroles, and boiling mud pots. Never part of Mount Tehama's main vent, Bumpass Hell is the result of fissures that tap the volcanic heat (which is thought to be a cooling mass of andesite, perhaps three miles (5 km) below the surface)
It is named after Kendall Vanhook Bumpass, a miner who worked in the Lassen area in the 1860s. K.V. Bumpass discovered the area and was named on a mining claim for the area. In 1865 the editor of the Red Bluff Independent newspaper took a trip with Bumpass to see the locale. During this trip K.V. Bumpass broke though a thin crust above a boiling mud pot, his leg was badly scalded and eventually had to be amputated. The area was named in his honor.