The girl, her mother and 6-year-old brother were flown to Taupo Hospital.
Later in the evening a 21-year-old American hiker was reported overdue when he did not meet his scheduled bus transport off the Tongariro Alpine Crossing.
He was later found at his motel, having left the track early and finding alternative transport to Taupo.
He is one of a number of tourists who over the last few weeks has failed to notify a bus driver that he was off the track and did not require a pickup.
At 7pm on Thursday, ambulance and police personnel were involved with the Greenlea rescue helicopter in the rescue of a 43-year-old outdoor instructor who had injured his leg while rock climbing at Kawakawa Bay on the north-western shore of Lake Taupo. He was flown to Rotorua Hospital.