According to the United States Census Bureau, the CDP has a total area of 13.2 square miles (34 km2). 13.1 square miles (34 km2) of it is land and 0.1 square miles (0.26 km2) of it (0.38%) is water.
The main commercial corridor that runs through Bethesda is Maryland Route 355 (known as Wisconsin Avenue in Bethesda and as Rockville Pike and Hungerford Drive in more northern communities), which, to the north, connects Bethesda with the communities of North Bethesda and Rockville, ending, after several name changes, in Frederick, Maryland. Toward the South, Rockville Pike becomes Wisconsin Avenue...
Source: Wikipedia (as of 04/11/2019). Read more from Wikipedia