Fire crews helped rescue a fallen hiker Saturday evening at Raven Run Nature Sanctuary in Lexington.
The hiker had potentially life-threatening injuries after the fall, fire department officials said.
Rescuers had to rappel down to the hiker to give him medical attention.
They moved the victim out using rescue boats on the river, then flew the victim to the hospital because of the severity of the injuries and the remote location of the incident.
The nature sanctuary had to close early for the rescue operation.