A rescue helicopter has been deployed to save nine stranded bushwalkers who spent the night on in the wilderness.
Nine bushwalkers were stranded in Wollemi National Park in NSW overnight when one of them fell and suffered a head injury about 7.30pm.
The 60-year-old man suffered a minor laceration to his head, a NSW Ambulance spokeswoman said on Sunday morning.
He was walking as part of a group of four when he fell.
Five other walkers from a separate party joined the group to watch over the man.
A chopper dropped paramedics into the scene about 10km west of Putty Rd in Colo.
The paramedics stayed with the group overnight.
The crew on board the rescue chopper winched the injured man and flew him to Liverpool Hospital for further treatment.
The eight others walked back to safety.