List of roads in Howard County, Maryland

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Road Route Places Landmarks Notes
Baltimore National Pike Edmondson Avenue (in Baltimore) to Frederick Ellicott City
West Friendship
Brick House on the Pike "Baltimore National Pike" is the designation for US-40 throughout Howard County. West of Ellicott City, US-40 merges into I-70, and the two routes share a path until Frederick. This part of I-70 is also known as Baltimore National Pike.
Bethany Lane Old Frederick Road to Baltimore National Pike Ellicott City Continues north of MD-99 as Old Mill Road and south of US-40 as Centennial Lane.
Brighton Dam Road Ten Oaks Road to Market Street (in Montgomery County Clarksville Triadelphia Reservoir
Brookeville Woolen Mill and House
Broken Land Parkway The Mall in Columbia to Guilford Road Columbia
Owen Brown
Kings Contrivance
The Mall in Columbia
Lake Elkhorn
Exit 18 off US-29. Exit 14 off Maryland Route 32


Road Route Places Landmarks Notes
Cedar Lane Harpers Farm Road to Guilford Road Harper's Choice
Hickory Ridge
Howard County General Hospital
Simpsonville Mill
James and Anne Robinson Nature Center
Continues south of Guilford Road as Pindell School Road. A second road known as "Cedar Lane" also exists north of this one from Rivendell Lane to a dead end just north of MD-108.
Centennial Lane Baltimore National Pike to Clarksville Pike Ellicott City Centennial High School
Centennial Park
Continues north of Baltimore National Pike as Bethany Lane and south of Clarksville Road as Beaverbrook Road.
Clarksville Pike US-29 interchange to Montgomery County line (at Patuxent River) Clarksville
Wilde Lake
Dorsey's Search
Centennial Park
Middle Patuxent Environmental Area
Rocky Gorge Reservoir
Exit 21 off US-29. MD-108 continues east of US-29 interchange as Old Annapolis Road, and in Montgomery County as "Ashton Road".


Road Route Places Landmarks Notes
Dobbin Road Oakland Mills Road to Snowden River Parkway Long Reach East Columbia Business District
Dorsey Road Scarlet Oak Drive to dead end southeast of Race Road (in Anne Arundel County) Elkridge Dorsey MARC rail station Continues northwest as Meadowridge Road. There is another Dorsey Road in Anne Arundel County, most of which is designated MD-176.


Road Route Places Landmarks Notes
Frederick Road Two discontinuous roads:
Lakeview Drive to Baltimore National Pike
Baltimore National Pike to Baltimore Street (in Baltimore)
Ellicott City
West Friendship
Roberts Inn Known as Main Street in historic Ellicott City


Road Route Places Landmarks Notes
Gorman Road Kindler Road to Washington Boulevard (in Prince George's County
Governor Warfield Parkway Little Pauxent Parkway to Little Pauxent Parkway Columbia Town Center An entrance to The Mall in Columbia Continues south of Little Pauxent Parkway as Banneker Road. Named after former Maryland governor Edwin Warfield.[1]
Guilford Road Mt. Moriah Lodge No. 7


Road Route Places Landmarks Notes
Hanover Road Old Washington Road to Deep Run Bridge Elkridge Continues in Anne Arundel County to Ridge Road.
Hoods Mill Road Woodbine Road to Frederick Road Cooksville Exit 76 off I-70


Road Route Places Landmarks Notes
Ilchester Road Montgomery Road to Patapsco River Ellicott City, Catonsville Saint Mary's Seminary Ruins, Patapsco Valley State Park, Patterson Viaduct


Road Route Places Landmarks Notes
Johns Hopkins Road Pindell School Road to Gorman Road Applied Physics Laboratory Exit 15 off US-29


Road Route Places Landmarks Notes
Lawyers Hill Road Montgomery Road to Levering Avenue Elkridge Lawyers Hill Historic District
Levering Avenue Lawyers Hill Road to Main Street (Elkridge) Elkridge Lawyers Hill Historic District, Thomas Viaduct, Patapsco Valley State Park
Little Patuxent Parkway Waterloo Road to end at circle to itself Town Center The Mall in Columbia
Howard County General Hospital
Howard Community College
Merriweather Post Pavilion
Long Gate Parkway Montgomery Road to Meadowbrook Lane Ellicott City Exit 1A off MD-100, used to access MD-103 from US-29 northbound.


Road Route Places Landmarks Notes
Main Street Name for Frederick Road in historic Ellicott City Ellicott City Ellicott City Station
Marriottsville Road Frederick Road to Runnymead Road (in Baltimore County) Ellicott City
Waverley Exit 83 off I-70
Marshalee Drive Montgomery-Meadowridge Roads to Montgomery Road Ellicott City
Marshalee, Timbers at Troy Golf Course
Meadowridge Road Brightfield Road to Scarlet Oaks Drive Elkridge Exit 4 off MD-100. Continues northwest of Brightfield Road as Montgomery Road, and southeast of Scarlet Oaks Drive as Dorsey Road
Montgomery Road Old Washington Road to Old Columbia Pike Ellicott City
Exit 23 off US-29


Road Route Places Landmarks Notes
Oakland Mills Road Sohap Lane to Guilford Road Oakland Mills, Columbia, Maryland Christ Church Guilford
Old Annapolis Road US-29 to Waterloo Road Columbia Exit 21 off US-29
Old Columbia Pike Frederick Road to Montgomery Road Ellicott City Oakland Mills Blacksmith House and Shop Formerly designated MD-987[2]
Old Frederick Road Twin Arch Road to US-29 Mt. Airy
Ellicott City
Old Washington Road Washington Boulevard and Abel Street to Washington Boulevard and Main Street Elkridge Historic Elkridge
Saint Augustine Church
Elkridge Fire Station
Was originally the route of U.S. 1 in Elkridge.


Road Route Places Landmarks Notes
Ridge Road Bond Street (in Carroll County to I-270 interchange (in Frederick County) Mt. Airy Exit 68 off I-70
Rogers Avenue Frederick Road to US-29 Ellicott City Continues west of US-29 as Old Frederick Road
Roxbury Mills Road Frederick Road to Montgomery County line Brookeville
Roxbury Mill
Patuxent River State Park
Union Chapel
continues north of Frederick Road as Hoods Mill Road and south of Patuxent River as Georgia Avenue.


Road Route Places Landmarks Notes
Saint Johns Lane Old Frederick Road to Montgomery Road Ellicott City Mount Hebron High School Exit 23 off US-29 Southbound.
Scaggsville Road Clarksville Pike to Doves Fly Way Highland
North Laurel
Reservoir High School Exit 13 off US-29. West of US-29, designated as MD-216. East of US-29, splits off MD-216 and carries no numerical designation. MD-216 continues as a separate road to Laurel. On its north end, continues north of MD-108 as Highland Road with no numerical designation.
Snowden River Parkway MD-100 to Broken Land Parkway (continues as Patuxent Woods Drive) Columbia
Ellicott City
Exit 3 off MD-100
Sykesville Road I-70 interchange to Old Washington Road (in Carroll County West Friendship
Exit 80 off I-70. Continues north of Old Washington Road as Washington Road, and south of I-70 interchange known only as MD-32 with no name.


Road Route Places Landmarks Notes
Tamar Drive Rainprint Row to Saddle Drive Long Reach Long Reach Village Center
Thunder Hill Road Old Annapolis Road to Santiago Road Oakland Mills Oakland Mills Village Center


Road Route Places Landmarks Notes
Washington Boulevard Dover Street (in Baltimore) to near Cherry Lane (in Prince George's County) Elkridge
North Laurel
Trinity Church Exit 3 off I-195, 6 off MD-100, and 12 off MD-32.
Waterloo Road Montgomery Road to Little Patuxent Parkway Also is name for MD 175 from MD 108 junction to Oceano Avenue in Jessup, Maryland Ellicott City
Exit 2 off MD-100. Carries two designations on different parts of the route: MD-104 and MD-108.
Whiskey Bottom Road Route 198 to Dead End North Laurel Edy's Ice Cream Plant
Woodbine Road Liberty Road (in Carroll County to Annapolis Rock Road Woodbine
Mt. Airy
Patuxent River State Park Exit 73 off I-70.
Woodstock Road Old Frederick Road to Baltimore County line (continues as Old Court Road) Woodstock


  1. ^ "Town Center",, accessed May 30, 2009
  2. ^