What:Grand Prix of Washington

Where:Adjacent to RFK Stadium

When:Tomorrow through Sunday

Who:Sports car competitors from the American Le Mans Series and three other racing series

Format:Endurance races of set time or distance

TV:Saturday, Chs. 13, 9, 2:30 p.m.; Sunday, 1 p.m., Chs. 11, 4

Schedule:Tomorrow, 9 a.m. to 7:05 p.m., practice and qualifying. Saturday, 9 a.m. to 1:10 p.m., practice and qualifying; 2:30 p.m., Trans-Am race; 4:15 p.m., Star Mazda race; 5:25 p.m., Speed World Challenge race. Sunday, noon, American Le Mans Series race; Speed World Challenge race, 3:20 p.m.

Tickets: 202-432-7328

Parking: No on-site public parking. Spectators should use Metro rail (Stadium-Armory station) or free shuttle from parking at USAirways Arena in Landover.