Mount Washington is an area of northwest Baltimore, Maryland. Historically, Mt. Washington was a small area. However, residents and businesses of many other nearby neighborhoods in the 21209 zip code where the neighborhood is located refer to their location as Mt. Washington. Though mostly within the Baltimore city limits, some of these areas are within Baltimore County

The actual Mt. Washington are is mostly residential, though it has two small commercial areas:

• Mount Washington Village, located off the west side of the Jones Falls Expressway near the Kelly Avenue bridge, containing several restaurants and stores, as well as the Baltimore Light Rail's Mount Washington Station.
• Mount Washington Mill, a refurbished textile mill now housing a Whole Foods, Starbucks, and other stores and offices, located off the east side of the Jones Falls Expressway near the Kelly Avenue bridge.

These two areas were at one time viewed as a single area, but since the construction of Interstate 83, these areas have been separated, and travel over a longer distance is required between them.

http://en.wikipedia.org/wiki/Mount_Washington,_Baltimore