The woman and her husband were out with their horses when her horse slipped, and they fell some 50 feet. The incident happened near Little Tujunga, above Sylmar.
The woman injured her leg and was airlifted out first. As for the horse, Animal Control rescuers had to wait for a vet to come in and tranquilize it before putting on a harness. Then, a Los Angeles County Fire Department chopper hoisted the horse to safety.
"He didn't suffer any great injuries to his body. The only thing he received was an injury to his forehead and just above the eye," said Officer Juan Maceda with Animal Control.
It remains unknown exactly what caused the horse and rider to fall.