The opening meet in this season's Middle Atlantic Road-Racing Series is this weekend over the two-mile Summit Point (W. Va.) course, eight miles southwest of Charles Town. Racing begins each day, rain or shine at 9 a.m.

Sunday's feature is 50-miler ftr showroom stock sedahs. Three drivers from the Soab factory team are entered, including Don Knowles of Springfield. Raise for production sport cars, modified sports racers and the open-wheeled formula racers are also on the schedule.

Dorsey (Md.) Speedway near Baltimore-Washington International Airport begins its 27th season Saturday night with its regular 10-race show for late-mode sedans and Figure Eight cars over the quarter-mile dirt oval. Rick Jones oobaltore gonr hi third straight late-model title. Bill Brown of Finksburg, M., is dfmtot.

The racing weekend begins tonight. Hutchins, the frequent winner from Richmond, has entered with the Emanuel Zervakis Chevrolet to compete Saturday night at Old Dominion Speedway in Manassas, where the feature race is 35 laps (about 14 miles).

Sunday has two national championship races. At Martinsville (Va.), the Winston Cup Grand National stock cars meet in a 210-mile event worth $100,000. Cale Yarborough is leading in the point standings.

In the final tunup before Indianapolis, the U.S. Auto Club racers have a $50,000, 200-miler at Trenton (N.J.) Fairgrounds. Al Unser leads in the point standings. Preceding the Indy car race will be a 62.5-mile (100-kilometer) dash for Formula SuperVees, the first in the new Mini-Indy series of these cars, which are primarily road racers.

Maryland International Raceway in Budds Creek, Md., offers drag races Saturday night and Sunday afternoon. The Sunday show is part of the Pro Comp seris featuring dragsters and funny cars.