One hundred and ten splinter jockeys launch their outboards in the annual Colorado river marathon-one of the longest, certainly the most treacherous of its kind. 73 Come back-the winner in the good time of two hours and 33 minutes for the rugged course. MLSOH - Crowds gather at the lake side looking at the speed boats. MLS - An official waves a white flag and the speed boat race is on its way. OHLS - Speed boats coming at the camera. POV - Camera mounted on the speed boat, you see what the boat pilot sees. MCUS - The speed boat pilots driving their boats. POV-S - The race official gives the checkered flag. MCUS - The winner, Dr. William Schaffer of San Diego.