Source: A Boyertown man was killed Sunday afternoon when he fell from his mountain bike on a trail on Mount Penn, authorities said. Christopher D. Hallman, 34, was riding with his brother, who was not identified, and both appeared to be experienced mountain bikers, officials said. Hallman rode down a hill near Drenkel Field between the Pagoda and the William Penn Memorial Fire Tower just before 2 p.m., city police said. His brother, who was following Hallman, briefly lost sight of him, then found Hallman lying on the trail and immediately called for help, investigators said. Officials said Hallman apparently tried to jump over a large rock on the trail, but fell off the bike and landed on his head and neck. He was wearing a helmet, elbow pads and leg protection, police said. Members of the Berks County coroner's office pronounced Hallman dead at the scene at 2:42 p.m. He died of multiple injuries, and the death was ruled an accident, officials said. Reading Deputy Fire Chief Thomas Kemery said he could not recall a fatal accident on the trail. "Here's a guy who was apparently extensively into it with a bike designed to do this sort of thing with the proper safety equipment," he said. "What exactly happened, we don't know, but he was being prudent in what he was doing."