(Single vehicle collision in the Sand Dunes)...It was reported Sunday afternoon.

The California Highway Patrol says they received the call at just after 4:00 in the afternoon. According to the CHP report, the Alpine resident was riding a Yamaha motorcycle in the Imperial Sand Dune Recreation area. He was riding just south of Osbourne Road at an unknown speed, when, for unknown reasons, he lost control of the motorcycle and was ejected from the motorcycle. Emergency personnel on scene attempted to resuscitate the man, but were unsuccessful and he succumbed to his injuries on scene. The rider was not wearing a helmet at the time. No other vehicle was involved in the incident. The Highway Patrol says the investigation is continuing.