A teenage boy has been found dead in a national park creek in the Blue Mountains after he became separated from a friend on a camping trip. Two boys, aged 16 and 17, travelled to Leura train station on Tuesday before they walked to Mount Hay, New South Wales police said. Sign up: AU Breaking News emailA multi-agency response was triggered, with the 17-year-old boy winched from the Acacia Flats camping ground, about 36km from Mount Hay. The search for the 16-year-old continued as rescue helicopters, paramedics and rescue squads scoured the wilderness. His body was found in a creek in Blue Gum forest at the Blue Mountains national park about 1pm on Thursday.