Its Skylight, Haystack, and Whiteface peaks are all over 4,000 feet tall, but the highest is Mount [*] Marcy.  
Its Skylight, Haystack, and Whiteface peaks are all over 4,000 feet tall, but the highest is Mount [*] Marcy.  Bounded to the south by the Mohawk River valley, they are a southern extension of the Canadian shield, and not part of the Appalachians. For 10 points—name this mountain range that also includes Algonquin peak in northeastern New York.
Its Skylight, Haystack, and Whiteface peaks are all over 4,000 feet tall, but the highest is Mount [*] Marcy.  
Adirondack Mountains [do not accept “Appalachians”]