mount mount called eroded cascade range volcanic center highest remaining remnant second highest peak connects park highest point located border peak highest point summit mountain year treated exceptional views california park features clear days mount seen distance started life years ago peak activity reached approximately meters high basal diameter approximately kilometers volcanic activity declined years ago volcanic lava forming edges mount later largest best known combination continued activity erosion particularly glaciers ice ages removed central cone volcano leaving large northern edge seen remnants include history area near haven new settlers 1800s wagon trains followed winding trails nobles trail cut vicinity near sacramento valley main landmarks trail volcano called prominent guide escorted california settlers volcano area given merit gripping volcanic phenomena included lava beds extinct volcanic declared president protect area future generations study enjoy roosevelt told area actually extinct terms activity despite assurance native americans area mountain active settlers continued think extinct dead continued settle nearby natives continued declare day mountain blow pieces exactly seven years later volcano began large explosive eruption sequence varying size took place seven years attracting national interest designation national park geography geology state california located pacific ring fire area highly active activity includes near produced oceanic originated volcanic complex area active million years formed period activity approximately years ago series faults largest times powerful eruption pleistocene constantly renewed lava flowed volcano eventually mountain time reached peak size volcano immense measuring base miles miles wide feet tall activity lasted approximately years varied material lava flows built minerals soon formation smaller began form shield like prospect peak appeared point pleistocene coming end additional final vent formed northeastern flank volcano flows time volcano dilapidated extensive erosion activity collapsed prior leaking dried forming smaller like result huge collapse miles diameter later activity built thirty known today active volcano area smaller younger years active remains sit california area known sharp scent thought center old located disappeared local moving northern flank years seen known flows parts subsequent explosive eruption ejected cubic miles material created large crater soon covered lava lava built area period activity began spanning years ejected cubic miles cubic miles material followed period periods activity taken place formed consisting activity including flows additional lava built activity include flora fauna near lower elevations present cedar red western white pine higher elevations groups mountain prevail eagles hawks frequently noted high live mountain recreation hiking especially popular mountain summer mountain trail lasts hours spans miles offers exceptional views intermittent active threat explosive taken place years occurred flows easily occur near areas river valleys like hat creek valley addition volcanic hazards possibly occur volcano 20th century activity occurred small compared eruption
Mount Tehama