Lassen Peak is a prominent volcanic dome and part of Lassen Volcanic National Park, known for active geothermal features, alpine hiking, and challenging summit routes.

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Geography

ContinentNorth America
RegionPacific Southwest
SubregionNorthern California
CountryUnited States
StateCalifornia
CountyShasta County
DistrictLassen Volcanic National Park
CityLassen Volcanic National Park
TimezoneAmericaLos Angeles
Latitude40.488
Longitude-121.51
Maps
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Lassen Peak is a towering volcanic dome reaching 10,500 ft (3,200 m) within Lassen Volcanic National Park. The peak was altered dramatically by a major eruption in 1915 that shaped its current craggy profile and opened its interior to alpine weather and snowfields. Pathways from the Pacific Crest Trail and associated trails lead through subalpine forests to high-elevation meadows and stark volcanic terrain. Climbers can access the summit via a well-maintained trail with switchbacks, though weather and snowpack require careful planning. The park around Lassen offers geothermal areas like Devastated Area and Bumpass Hell, with boiling springs and fumaroles exposing underlying magmatic activity. Nearby lakes, old-growth forests, and winter snow provide seasonal contrast to the rocky summit environment.

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