5/9/2003: Ultrarunners of the month for April, brought to you by Ultrafit Sports. Nikki Kimball, 31  NY edged hometown favorite Jennifer Pfeifer by a mere two minutes in winning the American River 50 Mile Run in Sacramento, California on April 5th.  Her time of  6:32:01 was good for 5th place over all in a field of 433 finishers. Kimball is a versatile distance runner, who excelsat mountain racing and snowshoe events.  She was a member of the bronze medal American team at last years 100K World Cup.      Nate McDowell, NM and Chad Ricklefs, CO fought a hard battle to tie for first at this year's Zane Grey Highline 50 Mile Trail Run on April 26th. Competing against an extremely deep and talented field, the pair turned in a strong performance over the very difficult Arizona Mountain terrain with a time of 8:11:44.  Ricklefs was the top ultrarunner of the year in 2002, winning the prestigious Ted Corbitt award.  McDowell is a defending National Champion, having won the 2002 White River 50 Mile National Championship at Crystal Mountain, Washington. Congratulations to these outstanding performers!   Ultrafit is a leading supplier of ultrarunning related products.  For more information, go to www.ultrafit-endurance.com