Maryland Route 109

Maryland Route 109
Maryland Route 109 highlighted in red
Route information
Maintained by MDSHA
Length	11.87 mi[1] (19.10 km)
Existed	1927–present
Tourist routes	Chesapeake and Ohio Canal Scenic Byway Antietam Campaign Scenic Byway
Major junctions
South end	MD 107 in Poolesville
Major intersections	MD 28 in Beallsville I-270 near Hyattstown
North end	MD 355 in Hyattstown
Location
Country	United States
State	Maryland
Counties	Montgomery
Highway system
Maryland highway system Interstate US State Scenic Byways
← MD 108 → MD 112

Maryland Route 109 (MD 109) is a state highway in the U.S. state of Maryland. The highway runs 11.87 miles (19.10 km) from MD 107 in Poolesville north to MD 355 in Hyattstown. MD 109 connects the northwestern Montgomery County communities of Poolesville, Beallsville, Barnesville, and Hyattstown with each other and with Interstate 270 (I-270). The highway was built between Beallsville and Barnesville by 1910. MD 109 was extended to Poolesville in the early 1920s and to Comus in the late 1920s. The route was extended north through its early 1950s interchange with I-270 to Hyattstown in the late 1950s.