The Home-Town Run is a 15-kilometer race through city neighborhoods from Dupont Circle to Capitol Hill, starting at 8:30 Sunday, to benefit the Washington Urban League's youth programs. It's also a three-kilometer fun run at 8:35 with registration for $1 open till racetime. And it's a food festiveal at the District Building, 14th and Pennsylvania NW, the start and finish point of the races, with 19 restaurants selling their breakfast and brunch specialties from 8:30 to 1:30, plus jazz bands, clowns and mime from 11 to 1, all cosponsored by Coca-Cola.

In a slower-paced fundraiser, a 20-mile walkathon to benefit the Muscular Dystrophy Association will trek from Wheaton Plaza to the Mormon Temple and back Sunday, 10 to 5. To register call 466-7450.

Also on Sunday, hundreds of bicyclists will pedal around Montgomery County park trails and sidestreets at 16 locations from 10 to 4 in the annual Ride-a-Bike to help mentally retarded citizens and to compete for prizes of 10-speeds, video games and savings bonds to be handed out in June by honorary chairman Glenn Brenner. You can register to join them and collect pledges on Friday and Saturday by calling 933-4343.