A 40-year-old mountain biker is being treated at Mission Hospital after being injured from a fall on Cactus Hill Trail near Santiago Canyon Road inside Whiting Wilderness Park.
The man suffered a head injury and broken arm and was air-lifted to Mission Hospital, said Orange County Fire Authority spokesman Jon Muir.
Firefighters were called at 9:48 a.m. by cell phone with seven people including other mountain bikers around the injured man, Muir said.
Rescuers used a Kawasaki Mule offroad vehicle, ground crews and a helicopter to reach the man.
"It was very difficult to get to that location," Muir said.
The victim was airlifted around 10:50 a.m., the spokesman said