Hot Water” in Lassen Volcanic National Park— Fumaroles, Steaming Ground, and Boiling Mudpots

Volcanic Resources Summary—Lassen Volcanic National Park (U.S. National Park Service)

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Travels in Geology: Lassen Volcanic National Park: A volcanic wonderland

The AFT Guide to Lassen Volcanic National Park - American Field Trip

Lassen Volcanic National Park – Travel guide at Wikivoyage

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Lassen Volcanic National Park

10 Things to Do in Lassen Volcanic National Park (+ Tips!)