Commuters willing to try what surveys show is one of the fastest methods of commuting in Washington's rush-hour traffic - by bicycle - will have a chance tomorrow to join a bicycle "commuter caravan" that will be spinning into the city from outlying areas.

The more than 35 caravans are part of bike races, rallies and other events sponsored by area bicycle groups. Two events are scheduled on the Ellipse: At noon Friday there will be a rally, with bike demonstrations and speeches by several congressmen who are bicycle enthusiasts, and from 11 a.m. to 4 p.m. Saturday there will be a blue grass and beer bike rally.

Tomorrow's caravan, to be led by experienced bike commuters, will leave from 28 different outlying locations, including seven in the District, between 6:30 a.m. and 8:15 a.m. All will end at the Mall. District departure points and times:

Chevy Chase Circle, Safeway parking lot, at 7:30 a.m.

Tenley Circle Library, near Wisconsin Avenue and Albemarle Street NW, at 7:30 a.m.

Columbia Road and 18th Street NW, at 6:30 and 8 a.m.

Columbia Road and 16th Street NW, at 8:15 a.m.

Mount Pleasnat and Lamont streets NW, at 7:30 a.m.

North Capitol Street and New Hampshire Avenue, Hooy Farms parking lot, at 7:30 a.m.

East Capitol and 12the streets, at Linclon Park, at 8:15 a.m.