December 8, 2004 Ultrarunners of the month for November 2004  Mike Dudley, 34, of Atlanta, GA nipped Kevin Beck by 50 seconds to win the USATF National 50K Championship on November 14th. A 2:14 marathoner, Dudley put his road speed to good use in averaging better than 6:00 minutes per mile pace to win the close contest with Beck.   Ann Riddle, 38, of Asheville, NC who is currently the leading road ultramarathoner in the US won the women's division of the USATF National 50K Championship in a time of 3:39:58. The win came only a couple of weeks after Riddle captured the National Trail Marathon Championship and only two months after her sixth place finish at the World Cup 100K in Winschoten, Netherlands, where she posted a remarkable 7:56:48 for the 62.1 mile distance.   Congratulations to these two outstanding performers.