Speedboat race along winding river connecting Lake Washington to Lake Sammamish

Title card: "SPORTS!" / Title card: "SAMMAMISH SPEEDBOAT CLASSIC" superimposed over MLS high angle view of speedboats racing along winding river toward camera / POV from back of camera boat, water-level view of boats racing toward camera / VS individual boats viewed from front side and rear, bobbing across water, throwing up spray, some spectators standing on bank / MLS-PAN LEFT boat passes under bridge screen right to boat getting ungrounded from bank screen left / MS as boats round curve toward camera, one runs ashore / LS high angle of boats racing away from camera / CU pilot steers speedboat, another boat coming up from behind him / POV from front of boat of quickly winding river / LS view from shore of two boats neck and neck, one plows thru wooden fence jutting partly into the water / MS two more boats speed past, the one closest to the camera plows thru remains of same fence / CU re-enactment of pilot pulling pieces of fence out of his shirt and lifejacket, another boat following behind, land in background with house in distant background / Note: exact day not known