In Somerset County, New Jersey.  What is the name of the Somerset
County vantage point from which Continental Officers watched British
Troop movements during the revolutionary war?

"Washington Rock".
  
  
From the New Jersey Department of Environmental Protection website:
  
"The strategic location of Washington Rock made it a valuable lookout
point during the American Revolution for General George Washington in
June of 1777 when the British army under General William Howe was
moving toward Westfield. From the vantage point of this natural rock
outcropping, General Washington had a thirty-mile panoramic view of
the valley and was able to instruct his troops to circle behind Howe?s
troops and cut off their retreat."
http://www.state.nj.us/dep/parksandforests/parks/washrock.html
 
 
From the South Plainfield Borough website:
  
"South Plainfield During the Revolutionary War
  
This area of New Jersey was occupied by the British from December 2,
1776 to June 22, 1777. Much activity took place in this vicinity
during the spring and summer of 1777. There were continuing British
and Continental Army movements between Perth Amboy and New Brunswick.
It is documented that General Washington and his troops had an
encampment in the New Market section of Piscataway and it is believed
that British troops led by General Cornwallis moved towards General
Washington and likely crossed Spring Lake on an old log road. In
response, Washington sought a higher vantage point to view British
troop movements and relocated his regiment to what became known as
"Washington Rock".
http://www.southplainfieldnj.com/history/
  
  
Search terms:
  
"somerset county" "new jersey" war british troops watched
://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&safe=off&q=%22somerset+county%22+%22new+jersey%22+war+british+troops+watched
  
 "washington rock" 
://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&safe=off&q=+%22washington+rock%22+
 
  
I hope this helps.
  
Jackburton

Thank you... you're right on the money.  I also found the answer with
a little digging on the web.  Thanks again!
Ken