I lost the book of trivia guestions that has the answer to my own trivia question. 

 I have no idea where Washington died. I have to find the book.
Edison?!?.......Last breath?!?
What have I got myself into??? 
 
Answer: Mount Whitney, Calif. San Bernadino County
http://en.wikipedia.org/wiki/Mount_Whitney
Mount Whitney 
East Face close-up seen from the way up on Whitney Portal. 
Elevation: 14,505 feet (4,421 metres) 
Location: California, USA 
Range: Sierra Nevada 
Coordinates: 36°34′42.9″N, 118°17′31.2″W 
Topo map: USGS Mount Whitney 
Type: Granite rock 
Age of rock: Cretaceous 
First ascent: 1873 
Easiest route: hike 
Mount Whitney is the highest point in the contiguous United States. It is located at the boundary between California's Inyo and Tulare counties. The western slope of the mountain lies within Sequoia National Park.
Mount Whitney was named after Josiah Whitney, the chief geologist of California. It was first climbed in 1873 by Charles Begole, A. H. Johnson, and John Lucas (fishermen who lived in Lone Pine, California.)
Mount Whitney is less than 90 miles from the lowest point of the United States, in Death Valley, and immediately rises just over 2 miles (~3300 m) in elevation above the floor of the Owens Valley. The Badwater Ultramarathon is a 135 mile (215 km) running race from the bottom of Death Valley and ending at an elevation of 8360 feet (2548 m) at Whitney Portal, the trailhead for Mount Whitney.