Maryland Route 508 (MD 508) is a state highway in the U.S. state of Maryland. Known as Adelina Road, the state highway runs 1.20 miles (1.93 km) from MD 506 in Bowens north to MD 231 near Barstow. MD 508 was constructed in the early 1930s from MD 231 to Adelina. The southern terminus was rolled back to Bowens in the late 1950s.
MD 508 begins at a four-way intersection in Bowens. Sixes Road heads east as MD 506 toward Port Republic and west as a county highway toward the Patuxent River. Adelina Road continues south as a county highway toward the unincorporated community of Adelina and the historic home Taney Place, which was the birthplace of Supreme CourtChief JusticeRoger Taney. MD 508 heads north as a two-lane road through a forested area with scattered residences. The state highway reaches its northern terminus at MD 231 (Hallowing Point Road) near Barstow.