About: Maryland Route 104

Maryland Route 104 (MD 104) is a state highway in the U.S. state of Maryland. Known as Waterloo Road, the state highway runs 1.14 miles (1.83 km) from MD 108 in Columbia north to MD 103 in Ellicott City. MD 104 connects MD 108, MD 103, and MD 100 in northeastern Howard County. The state highway was originally constructed as MD 531 in the early 1930s and became part of MD 175 in the mid-1940s. After MD 175 was rerouted through Columbia in the late 1970s, MD 104 was assigned to its present course.