At 7.30am this morning emergency services received a call that a 24 year old woman had fallen 300m near Annette Plateau in the Mt Cook National Park.
She has since been rescued by the Mt Cook Rescue Team and flown to Christchurch Hospital where her condition is said to be serious.
"She has suffered serious head injuries," says Constable Brent SWANSON, Twizel Police.
The woman had been a member of a party of four clients with a guide on a basic mountaineering course.
The woman is from Denmark and her family have been notified.