Shortly after 10 a.m., firefighters and other emergency personnel were dispatched to the 9200 block of Foxen Canyon Road, fire Capt. Scott Safechuck said.
A witness saw the bicyclist fall or crash and the rider experience cardiac arrest, leading to lifesaving measures by a bystander.
The cyclist, whose name was not available, was treated by medics and transported to the hospital by a Calstar medical helicopter, Safechuck added.
The patient was reportedly speaking when he arrived at the hospital’s Emergency Department, Safechuck said.