6/24/2003: Ultrarunners of the month for May, brought to you by Ultrafit Sports. Tom Nielsen, 43, Annandale, VA, a veteran ultrarunner who only recently located to the Virgina from the west coast, won the technically difficult  Massanutten Mountain Trail 100 Miler in a time of 21:55:30.  Nielsen is a past winner of the Angeles Crest 100 Miler and one of the top finishers from Western States a few years back.   Bethany Hunter, 24, Lynchburg, VA, is a relative newcomer to the ulltrarunning community and at the age of 24, one of the youngest.  A protégé of David Horton, Hunter took the women's crown at Massanutten in a time of 24:40:20, becoming one of the youngest 100 mile trail winners in the United States. Congratulations to these two outstanding performers.  Ultrafit is a leading supplier of ultrarunning related products.  For more information, go to www.ultrafit-endurance.com