DRIVING SLOW ON WET GRAVEL ROAD AND A LARGE CLOUD ORF WHITE SMOKE AND FLAMES ERUPTED FROM DRIVERS SIDE OF HOOD. STOPPED AND GRABBED THE FIRE EXTINGUISHER FROM BEHIND DRIVERS SEAT AND ATTEMPTED TO OPEN HOOD WITH HOOD RELEASE BUT HOOD WOULD NOT OPEN. ATTEMPTED TO PUT OUT FIRE THRU DRIVERS SIDE FRONT WHEEL WELL BUT WAS UNSUCCESSFUL. CALLED 911. ENTIRE CAB AND ENGINE COMPARTMENT WAS CONSUMED BY THE TIME 911 ARRIVED. *TR