The incident happened at the bottom of Sugar's Run, which is accessed by the Coronet Express chairlift, which was shut down as a result for two hours, NZ Ski chief executive Paul Anderson said in a statement.
Coronet Peak medical responders, including a doctor, nurse and patrol were on the scene minutes afterward and began CPR which continued until St John Ambulance paramedics arrived at 9.45am.
Anderson said skifield management was in contact with the woman's family.