Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Mount Jefferson is a stratovolcano in the Cascade Volcanic Arc, part of the Cascade Range, and is the second highest mountain in Oregon. Situated in the far northeastern corner of Linn County on the Jefferson County line, about 105 miles east of Corvallis, Mount Jefferson is in a rugged wilderness and is thus one of the hardest volcanoes to reach in the Cascades; though USFS Road 1044 does come within 4 miles of the summit. The lower reaches of the mountain''s north side also extend into southeastern Marion County, although its summit does not. Many people consider Jefferson''s craggy, deeply glacially scarred appearance to be especially beautiful and photogenic. The peak has therefore frequently served as a backdrop for automobile and alcohol advertisements in the United States.