Lassen Peak(redirected from Mt. Lassen)
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Lassen Peak:see under Lassen Volcanic National ParkLassen Volcanic National Park,
106,372 acres (43,081 hectares), N Calif., at the southern end of the Cascade Range. Proclaimed as Lassen Peak and Cinder Cone national monuments in 1907, the two were incorporated into a new national park in 1916.
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a volcano in the USA in the southern Cascade Mountains. Altitude, 3,187 m. It is active with long hiatuses; it was considerably active from 1914 to 1917. The region around the peak, with its lava fields, volcanic cones, geysers, hot springs, varied vegetation, and rich fauna, was set aside in 1916 as Lassen Volcanic National Park.