California Mountain: Lassen Peak 
Wednesday, January 8, 2014 at 10:42AM
Jo Giessner

Did you know that as early as 1836 the mountain was mapped as Roger's Peak? In 1851, Scholfield's map called it Mt. St. Joseph, and in 1855 and 1857 maps designated the formation as Lassen's Butte. By 1879, Peterman's map called the mountain, Mount Lassen. The "official" name is Lassen Peak as of 1915.~

1938 Lassen Volcanic National Park, California, United States Government Printing Office:  Events of Historical Importance

1820 - Arguello exploring party first to record and name Lassen Peak (St. Joseph's Mountain).

1850-51 - Last lava flow from Cinder Cone.

1864 - Helen Brodt, first white woman to climb Lassen Peak; made the ascent with Major Reading. Lake Helen named after Helen Brodt.

1906 - Lassen Peak and Cinder Cone National Monuments set aside May 6 by President Theodore Roosevelt.

1914 May 30 - First known eruption of Lassen Peak since coming of white man.

1915 May 19 and 22 - Two major eruptions of Lassen Peak occurred on these dates and resulted in the devastation of several miles of fine timber and forest land.

1916 - Lassen Volcanic National Park created by act of Congress.

1921- Lassen Peak ceased to erupt and subsided into a state of quiescence.

1925 - Active development of park began. Lassen Peak Loop Highway started.

1931 - Lassen Peak Loop Highway completed. Three-day dedication celebration held in park.~


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