The elevation of Washington, D.C., varies across the city, but the average elevation is approximately 150 feet (46 meters) above sea level. Some areas, like Capitol Hill, may reach elevations of around 200 feet (61 meters), while the lowest points are near the Potomac River. The city's topography is characterized by its hills and valleys, contributing to its varied elevation.
One way you can wash your DC shoes is to put them in a washing machine. You can put them in a netted bag if you like.
A USGS topo map that shows DC shows that the elevation lines are 350-370 feet near the top, and "377" is on the Washington Cathedral grounds that is Mount Saint Alban. So "377 feet" is the highest elevation in DC.
Uh, Maryland is a STATE ! Wash., DC has no 'capital' !
George Washington
100 miles
555 miles
63
The DC area elevation ranges from 0 ft (sea level) to 409 ft above sea level.
Needham, MA to Washington, DC by road is 432 Miles - 696km
Benjamin Banneker
5 hours
about 2700 miles