West Rock

West Rock is a traprock hill that rises to the northwest of downtown New Haven, Connecticut and runs in a north-northwest direction into the neighboring town of Woodbridge. Its approximate elevation is 400 feet, and it consists largely of reddish and blackish basalt -- much like its sister formation East Rock. West Rock has been designated as a public park by the city of New Haven, and contains trails and extensive forests. In the 17th century, West Rock served as the hideout for the "Regicide judges" who were fleeing persecution by Charles II of England; their obstensible hideout is preserved at Judges' Cave.

The West Rock Tunnel was bored through West Rock in order to make passage for the Wilbur Cross Parkway. Other human alterations to the hill include the construction of a radio tower on its crest, as well as encroachment on its cliffsides by residential development. During exceedingly dry months, it is not uncommon for forest fires to break out on West Rock.