Maryland Route 188 has major intersections located in Glen EchoBethesda line and Bethesda,  an unincorporated, census-designated place in southern Montgomery County, Maryland.
Glen EchoBethesda line Bethesda Bethesda is an unincorporated, census-designated place in southern Montgomery County, Maryland, United States, located just northwest of Washington, D.C. It takes its name from a local church, the Bethesda Meeting House (1820, rebuilt 1849), which in turn took its name from Jerusalem's Pool of Bethesda. 
