Top Results for Lassen

Bumpass Hell is a striking mudpot basin within Lassen Volcanic National Park. It’s notable for being the park's largest hydrothermal area characterized by intensely sulfuric steam and boiling mud formations. The area gained its name from Kendall Bumpass, who suffered burns during an encounter with t...

Subway Cave is a subterranean lava tube located in the Lassen National Forest in Northern California, formed approximately 20,000 years ago by the cooling Hat Creek basalt flow. The cave is distinguished by its accessible, self-guided walk-through trail, which allows visitors to experience its dark,...

Sulfur Works is an active geothermal area located in Lassen Volcanic National Park in northern California, United States. It is situated along the main park road and features boiling mudpots, steaming fumaroles, and strong sulfuric gas emissions. The site represents surface activity associated with...

Sulphur Works is a hydrothermal area located along the main road in Lassen Volcanic National Park, California. It represents a remnant volcanic vent on the southwestern flank of Lassen Peak. The site features steaming fumaroles, boiling mudpots, and sulfurous gases visible from a roadside viewpoint.

The Devils Kitchen Mudpots are a cluster of geothermal mudpots located in the Warner Valley area of Lassen Volcanic National Park in northern California. They form part of one of the park's hydrothermal areas, where volcanic heat drives water and steam to the surface, creating bubbling mud and sulfu...

Subway Cave is an accessible lava tube located in Lassen Volcanic National Park in Northern California. It was created when the outer crust of a basaltic lava flow cooled and solidified while the molten interior continued to flow. The cave is managed by the National Park Service and features a devel...

Sulphur Works Mudpot is a hydrothermal feature located in Lassen Volcanic National Park in northern California. It consists of a pool of bubbling clay and water heated by volcanic gases from beneath the surface, creating a distinctive muddy cauldron. The area around Sulphur Works represents the most...

Devils Kitchen is a hydrothermal area located within Lassen Volcanic National Park in northern California. It is a geothermal feature characterized by active fumaroles, boiling mud pots, and highly acidic hot springs that release sulfurous gases. The extreme conditions and acidic waters gradually al...

Devil's Kitchen is a distinct hydrothermal area located in the backcountry of Lassen Volcanic National Park in California. Accessible via hiking trails near Juniper Lake, the site is situated in a forested setting that starkly contrasts with the barren ground of the thermal features. The area featur...

Terminal Geyser Mudpots is a hydrothermal area situated within Lassen Volcanic National Park in California. Despite its name, Terminal Geyser is actually a powerful, continuously emitting steam vent rather than a water-erupting geyser. The surrounding area features active mudpots and acidic soils cr...

Terminal Geyser Fumaroles are steam vents located in Lassen Volcanic National Park, California, an area known for its diverse hydrothermal features. Despite its name, Terminal Geyser is actually not a true geyser but rather a stream flowing over a steam vent, creating the appearance of constantly bo...

Bumpass Hell is a prominent hydrothermal area located within California's Lassen Volcanic National Park. Named after an early settler who severely burned his leg after breaking through the thin crust, the site is characterized by boiling mud pots, steaming pools, and powerful sulfur-emitting fumarol...

Little Hot Springs Valley Mudpots is a hydrothermal area in Lassen Volcanic National Park, California. The valley contains steam vents, boiling pools, and mudpots produced by groundwater heated within the Lassen volcanic system, and hydrothermal activity can vary with seasonal water supply. The Nati...

Pilot Pinnacle is a prominent volcanic fumarole formation in Alaska's Valley of Ten Thousand Smokes that solidified from magma venting during the 1912 Novarupta eruption.

Terminal Geyser is a geothermal feature in Warner Valley at Lassen Volcanic National Park in California. Despite its name, it is not a true geyser that periodically erupts a column of water; instead, a cold stream flows across a geothermal steam vent. The feature is therefore an example of why volca...

Sulfur Works is a hydrothermal area beside the main park road in Lassen Volcanic National Park, California. Fumaroles and other hot-ground features there emit steam and sulfur-bearing gases, providing an accessible example of the volcanic activity beneath the park. The site lies within the Lassen vo...

Little Hot Springs Valley is a hydrothermal area in Lassen Volcanic National Park, California, near Sulphur Works. Its hot ground, fumaroles, and chemically altered volcanic rocks are products of the Lassen volcanic system. The alteration has produced conspicuous red, yellow, and buff clays, which d...

Big Boiler is a large fumarole in Bumpass Hell, the hydrothermal area of Lassen Volcanic National Park in northern California. It releases steam and volcanic gases from the park's active geothermal system, and measurements at the feature have reached about 322 degrees F (161 degrees C). The site ill...

The Little Hot Springs Valley Fumaroles are steam vents in Lassen Volcanic National Park in northern California. They form part of the park's hydrothermal system, which is driven by heat associated with the volcanic region around Lassen Peak. The fumaroles are of interest to visitors and earth-scien...