Local runners who did not know Sebastian Junger, 23, before yesterday's Hometown 15-Kilometer road race should know him now.

In the year since he moved from Boston to the District, he has beaten some of the top local runners. But none of those efforts compares to yesterday's.

He outdistanced an estimated 1,150 starters in the 9.3-mile tour of the District in a course-record 47 minutes 11 seconds. With the weather nearly perfect for the first time in the five years of the race, he cut 1:46 from the 1984 record of Allen Naylor and Mike Mansy. Naylor was fifth yesterday.

Coleen Troy, 27, of Rockville won the women's race in 56:09. Rosemary Hessman, 24, of Washington was second in 58:20 and Marta Vogel, 34, of Takoma Park third in 58:45.

It took Junger less than two miles to convince the rest of the front-runners that he was not going to be beat.

He led by 100 meters after three kilometers, 200 meters by six kilometers and more than 300 meters by the 10-kilometer mark.

"You got away quick," runner-up Tim Dowd of Falls Church told him. "Everyone was saying 'Who is that guy?' and people were saying 'I don't know.'

"I thought I'd hang out with Naylor for a while. At one mile, we just let (Junger) go . . . I could never see him after 5 1/2 kilometers (3 1/4 miles) because there were so many turns."

Junger, a writer, said, "I didn't think I would be so far in front. I looked back at the mile and I was freaked out. There were a couple of adidas guys out there, but they didn't go with me.

"I started to wonder (about winning) at the mile mark. At 5K, I was pretty sure I would take it, barring a collapse or something, because I hadn't run over 10K before. But I was hurting over the last 5K."

Troy led the women from the start and ran her fastest 15 kilometers by more than five minutes.

Ed Benham, a 77-year-old distance veteran from Ocean City, Md., broke his world record for his age group (75-79) and single age with a time of 66:58.