A patron at Hermits Falls in the Chantry Flats area sustained injuries earlier Saturday.
Details were few, but authorities at the Sierra Madre Police Station reported an adult male received a shoulder injury.
The rescue effort began after 9:30 a.m. Air Rescue 5 from the Los Angeles County Sheriff's Department responded to the area along with fire fighters. Roughly an hour later, the patient was hoisted and flown to Huntington Memorial Hospital, according to scanner reports.
No further information was available.