The Catskill Mountains in New York.
Catskill Mountains definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
mountain range of the Appalachian system, in SE N.Y.: resort area: highest peak, c. 4,200 ft (1,280 m)
Origin: Dutch cat's stream; reason for name unknown
Catskill Mountains definition by American Heritage Dictionary
A range of the Appalachian Mountains in southeast New York just west of the Hudson River. The mountains, rising to 1,282.2 m (4,204 ft), include popular resort areas.