where is mount jefferson located?
Jefferson County United States of America Linn County Oregon Marion County
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 Mount Jackson ( Mount Andrew Jackson and Mount Ernest Gruening ) is a mountain that dominates the upland of the southern part of the Antarctic Peninsula . It is located in Palmer Land , within the Antarctic claims of Argentina , Chile and the United Kingdom . With an elevation of 3 @,@ 184 metres ( 10 @,@ 446 ft ) , Mount Jackson is the highest mountain in the Antarctic Peninsula and the British Antarctic Territory . Discovered by members of the United States Antarctic Service , 1939 – 41 , it was named for Andrew Jackson , the seventh President of the United States . The first ascent of Mount Jackson was made by a team led by John Crabbe Cunningham of the British Antarctic Survey ( BAS ) in 1964 . Mount Jackson 's geology was studied in 1972 as part of the Palmer Island investigations by a team of geologists . 

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 Its size , distance from major cities , and its tendency to be forgotten or ignored by people less familiar with the Pacific Northwest , has led some people to call Mount Adams “ The Forgotten Giant of Washington . ” 

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 The park is at an elevation of 1 @,@ 637 feet ( 499 m ) on the Allegheny Plateau , which formed in the Alleghenian orogeny some 300 million years ago , when Gondwana ( specifically what became Africa ) and what became North America collided , forming Pangaea . Although the gorge and its surroundings seem to be mountainous , the area is a dissected plateau . Years of erosion have cut away the soft rocks , forming the valleys , and left the hardest of the ancient rocks relatively untouched on the top of sharp ridges , giving them the appearance of " mountains " . 

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 Created by President Theodore Roosevelt in 1906 , it occupies 52 @,@ 485 acres ( 21 @,@ 240 ha ) near the Four Corners region of the American Southwest , and with more than 4 @,@ 300 sites , including 600 cliff dwellings , it is the largest archeological preserve in the US . Mesa Verde ( Spanish for " green table " ) is best known for structures such as Cliff Palace , thought to be the largest cliff dwelling in North America . 

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 Today , the estate is owned by the Hearst Corporation , and is not open to the public . Wyntoon is located at approximately 41 ° 11 ′ 21 ″ N 122 ° 03 ′ 58 ″ W. It is north of Lake McCloud , a man @-@ made lake completed in 1965 , and about 9 miles ( 14 km ) due east of Dunsmuir , California . Energetic kayakers willing to endure dangerous rapids can view the estate from the Upper McCloud River during spring and summer snowmelt . 
