The 24-year-old woman was hurt in an accident and transported by an Otago Regional Rescue Helicopter from Young Hut, on the Gillespie Pass Circuit, about 8.30am on Saturday.
She was taken to Lakes District Hospital in Queenstown.
The Department of Conservation lists the circuit as an advanced route for experienced trampers.
The exact nature of her injuries were unknown, but a reliable source said it was not a fall.