Maryland Route 104

Maryland Route 104
Waterloo Road
Maryland Route 104 highlighted in red
Route information
Maintained by MDSHA
Length	1.14 mi[1] (1.83 km)
Existed	1979–present
Major junctions
South end	MD 108 in Columbia
Major intersections	MD 100 in Ellicott City
North end	MD 103 in Ellicott City
Location
Country	United States
State	Maryland
Counties	Howard
Highway system
Maryland highway system Interstate US State Scenic Byways
← MD 103 → MD 107

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.