RedactedNarrative: VESSEL ONE, A 1997 31 FOOT THUNDERBIRD FORMULA BOAT WAS TRAVELING SOUTHEAST DOWN THE COLORADO RIVER DURING NIGHT TIME HOURS WITH LITTLE TO NO MOONLIGHT.  THE BOAT WAS OCCUPIED BY THE OPERATOR AND SIX PASSENGERS.  THE OPERATOR ADVISED THAT IT WAS DARK AND THAT HE WAS HAVING A HARD TIME SEEING IN FRONT OF HIM.  HE SAID THAT HE WAS FOLLOWING A BOAT WITH FLASHING ORANGE LIGHTS WHEN HE LOST SIGHT OF IT.  THE BOAT THEN STRUCK LAND AND TRAVELED ABOUT 60 FEET INTO THE WEEDS WHERE IT FINALLY CAME TO A STOP.  ALL OF THE OCCUPANTS ADVISED THAT THEY WERE UNINJURED.