RedactedNarrative: On 7/11/2021, at approximately 07:55hrs, Wyoming Vessel WY 7897 DB caught fire while attempting to depart the North Beach State Park Jetty South ramp. Upon investigation, I determined there were 5 individuals on-board. These individuals stated that as the vessel departed, a fire erupted between the fuel compartment, and the engine compartment that was unaffected by the use of a single B-1 Fire extinguisher. Upon unsuccessful attempts at extinguishing the fire, all five individuals left the boat and returned to shore a short distance away. No PFD's were in use at the time of the accident. The vessel was left adrift, until suppression efforts were able to extinguish the flames. The vessel was impounded by Bear Lake Co. Sheriffs Office for further investigation.