More than 3,000 women are expected to participate in the fifth annual Bonne Bell/Chevrolet 10-kilometer road race at 8 a.m. today in West Potomac Park.

Last year, Eleanor Simonsick outran 3,500 competitors to win in 35:05. She will not defend her title this year.

Marge Rosasco, 35, of Fallston, Md., running for the Brooks Racing Team, is the only top-five finisher from last year who has entered the race. Rosasco was second in 35:08.

Pia Palladino of Georgetown holds the course record, running sub-35:00 in 1981.

Other prerace favorites are Andrea Rashid, 18, of Bethesda; Kathy Heckman, 27, of Richmond, running for the Howard County Striders; and Anne Haefler of Silver Spring.

Haefler, a 12-year-old White Oak seventh-grader, set a national 12-and-under 10-kilometer record in the WETA 10-kilometer run (36:23) last November .

The runners will start in West Potomac Park, travel around the Tidal Basin, and run along the river in East Potomac Park. The course turns around at Hains Point, runs back along the river, and finishes at West Potomac Park.

Entries closed April 30, and will not be accepted on the day of the race.