NEW YORK, NOV. 24 -- World champion Lynn Jennings broke her course record today while winning a fourth straight women's national cross-country title, and Bob Kempainen ended Pat Porter's run of eight in a row in the men's race.

For Jennings, it was the fifth title overall -- she won her first in 1985 -- and enabled her to tie track and field Hall of Famer Doris Brown Heritage for most victories in the women's TAC cross-country championships.

Jennings covered the hilly, six-kilometer (3.8-mile) distance at Van Cortlandt Park in 19 minutes 7 seconds, breaking the course record of 19:35 that she set in 1987.

Kempainen, of Minnetonka, Minn., scored an upset in winning the men's 10-kilometer (6.2-mile) race in 30:23, giving Porter his first loss in the national cross-country championships since 1981.

Kempainen, a former Dartmouth student, was the 1988 runner-up and finished third in 1989. But he didn't figure to do that well this year, because he is a first-year medical student at the University of Minnesota.

"In the back of my mind, I thought if I caught a good day I would be in the hunt, but I didn't anticipate winning," Kempainen said. "I'm psyched to have beaten someone of Pat's caliber. This is unreal. I don't believe it."

Porter, of Alamosa, Colo., had become the all-time men's champion last year by winning his eighth straight title at Golden Gate Park in San Francisco. That broke the record of seven he had shared with Don Lash, the winner from 1934-40.

"I'm almost relieved . . . {but} disappointed," Porter said about the end of his streak. "I just didn't click today."

He finished second in 30:35 and was followed by John Nuttall of Ames, Iowa, in 30:46; Aaron Ramirez of Albuquerque in 30:47, and Reuben Reina of Fayetteville, Ark., in 30:51.

Kempainen and Jennings qualified for the U.S. team that will compete in the IAAF world cross-country championships at Antwerp, Belgium, on March 24.