List of state highways in Maryland shorter than one mile (800–899)
The following is a list of state highways in Maryland shorter than one mile (1.6 km) in length with route numbers between 800 and 899. Most of these highways act as service roads, old alignments of more prominent highways, or connectors between one or more highways. Many of these highways are unsigned and have multiple segments with the same number. Several of these highways have their own articles; those highways are summarized here and a link is provided to the main article. This list does not include highways where  at least one highway of that number is at least one mile in length. All highways at least one mile in length have their own article. The highways shorter than one mile with the same number are covered in the main article for the highway. MD 804. Maryland Route 804 (officially MD 804B) is the unsigned designation for a section of old alignment of MD 64 through Chewsville. The state highway follows Track Side Drive from the western junction with MD 64 to MD 62 and Twin Springs Drive from MD 62 to the eastern intersection with MD 64. MD  805. Maryland Route 805 (officially MD 805B) is the unsigned designation for an unnamed section of old alignment of MD 60 from a dead end north to Rocky Forge Road on the northbound side of MD 60 just south of the Pennsylvania state line near Leitersburg. MD 810. Maryland Route 810 is a collection of 11 unsigned highways that are sections of old alignments of and service roads related to the present and old alignments of MD 210 (Indian Head Highway) in Accokeek in southwestern Prince George's County. The segments of MD 810 are designated in roughly alphabetical order  from south to north with MD 810A near the Charles County line and MD 810K at the intersection of MD 210 and MD 373. MD 813. Maryland Route 813F is the unsigned designation for Twiford Road which runs from a short distance south of Maryland Route 313 north to State Street near Sharptown, Wicomico County, crossing MD 313. The route is long. MD 815. Maryland Route 815 is the designation for Old Quantico Road, the old alignment of MD 349 (Nanticoke Road) just west of Salisbury. The state highway runs between two intersections with MD 349. MD 817. Maryland  Route 817 is the designation for two sections of old alignment of MD 331 and MD 16 in the southwestern corner of Caroline County. MD 819. Maryland Route 819 is the designation for Reids Grove Road, a loop off Maryland Route 331 in Reids Grove, Dorchester County. The route is long. MD 820. Maryland Route 820 is the unsigned designation for the westernmost end of Castle Hall Road. The state-maintained portion runs from Maryland Route 313 to a dead end in Caroline County. Near the middle, the county-maintained portion of Castle Hall Road intersects the route. The state -maintained portion is long. MD 821. Maryland Route 821 is the unsigned designation for Main Street, a highway that passes through the town of Marydel, intersecting MD 311 (Halltown Road) and connecting with MD 454 (Crown Stone Road/Halltown Road) at both ends. MD 822. Maryland Route 822 is the designation for UMES Boulevard, a connector between US 13 and College Backbone Road on the campus of the University of Maryland Eastern Shore. MD 822 heads east from US 13 as a two-lane divided highway, reaching a roundabout with MD 675. Past this point, the route passes student apartment  complexes and curves southeast, becoming undivided and crossing the Delmarva Central Railroad's Delmarva Subdivision railroad line at-grade. The road runs through a wooded area and crosses Loretta Branch prior to becoming a divided highway again and heading onto the university campus. Here, MD 822 passes to the west of athletic fields before coming to its terminus at College Backbone Road. MD 822 was constructed as a new access road to the University of Maryland Eastern Shore campus and opened to traffic in 2001. In 2010, plans were made to construct a roundabout at the intersection of MD 675  and MD 822 in Princess Anne. The roundabout was completed in 2015. MD 825. Maryland Route 825 is the designation for a pair of unsigned highways in Garrett County. MD 826. Maryland Route 826 is a collection of 14 unsigned highways that are or were service roads constructed or old alignments maintained to provide access to private property or county highways whose access was compromised by the reconstruction of US 219 in Garrett County in the 1950s. Several instances of MD 826 connect with auxiliary routes of US 219. MD 826A through MD 826D and MD 826R are found near  Oakland. MD 826E, MD 826G, MD 826H, and MD 826J through MD 826N are located between Accident and Keyser's Ridge. MD 826P was established between Hoyes and Accident. MD 827. Maryland Route 827 is the unsigned designation for two short sections of old alignment of MD 39 in western Garrett County. MD 828. Maryland Route 828 is the unsigned designation for a spur of old alignment from MD 42 west of Friendsville. The road serves the local refuse and recycling center. MD 830. Maryland Route 830 is the unsigned designation for two short spurs. These spurs are the  remnants of curves removed when US 220 was rebuilt in the 1950s. MD 830A has a length of and is located in Dawson. MD 830B has a length of and is located in Rawlings. MD 831. Maryland Route 831 is a collection of nine unsigned state highways, eight of which are sections of the old alignment of MD 36 between Frostburg and Cumberland in northwestern Allegany County. The segments of MD 831 range from MD 831A at MD 36's northern terminus to MD 831G south of Frostburg. MD 831H and MD 831I are spurs from MD 831C and  MD 831A, respectively. MD 831J is a section of the old alignment of MD 31 in New Windsor in Carroll County. MD 833. Maryland Route 833 is the designation for Old Blackrock Road, which runs from MD 30 Business east to MD 88 in Hampstead. The western end of MD 833 is one-way westbound; traffic from MD 30 Business uses Gill Avenue to access eastbound MD 833. MD 833's eastern terminus is a roundabout that includes both directions of MD 88, which heads east as Black Rock Road and west as Lower Beckleysville Road, and county-maintained Lower  Beckleysville Road as the northeast leg. MD 834. Maryland Route 834 is the unsigned designation for Hayden Clark Road, a highway near Price that runs between a T intersection with Granny Branch Road and White Marsh Road east to an at grade crossing with the Centreville Branch of the Northern Line of the Maryland and Delaware Railroad, where the highway continues east as Hayden Road. MD 834 intersects both directions of US 301 and provides access to the Bay Country Welcome Center in the wide median of US 301. MD 835. Maryland Route 835 is a collection of thirteen state  highways that are service roads or old alignments in the vicinity of MD 18 and US 50 and US 301 in western Queen Anne's County. One of the highways, MD 835A, is signed; it is the only state highway in Maryland that is signed with its letter suffix. MD 835 and MD 835G are found in Kent Narrows. MD 835A, MD 835C, and MD 835F are located in Stevensville. MD 835B and MD 835H through MD 835K are in Grasonville. MD 835L and 835M are near Queenstown. MD 835N is near Centreville. MD 837. Maryland Route  837 is the unsigned designation for Church Circle, which runs from MD 300 (Main Street) north and east to MD 313 (Church Street) in the northwest quadrant of Sudlersville in northern Queen Anne's County. The road now known as Church Circle was improved as early as 1953, when the Maryland State Roads Commission accepted the road, then known as the High School Cut-Off Road, into the county roads system maintained by the state through a July 8, 1953, resolution. The town of Sudlersville agreed to the transfer of Church Circle from town to state maintenance in August 1962 , and the Maryland State Roads Commission effected the change through an October 23, 1962, memorandum of action. The state agreed to take over the road because it was well paved with a wide right of way and provided a bypass of the MD 300–MD 313 intersection with unobstructed views at its termini, in contrast with the dangerous, blind intersection of Main Street and Church Street in the center of town. MD 843. Maryland Route 843 is a collection of unsigned state highways that serve as connections between MD 63 and sections of old alignment of MD 63 between Williamsport  and Huyett. MD 844. Maryland Route 844 is the unsigned designation for Cavetown Church Road, a section of old alignment of MD 77 in Cavetown. The state highway runs from MD 64, where a county-maintained portion of Cavetown Church Road continues west, east past Wolfsville Road to a dead end adjacent to the current alignment of MD 77. MD 846. Maryland Route 846 is the unsigned designation for a pair of unnamed roads southeast of the MD 64–MD 418 junction in Ringgold. MD 847. Maryland Route 847 (officially MD 847D) is the unsigned designation for Fritz Lane, a  section of old alignment of MD 64 from Welty Church Road north to a dead end, paralleling the northbound side of MD 64 north of Smithsburg. MD 849. Maryland Route 849 is the unsigned designation for the section of Leisters Church Road between MD 852 and MD 482 in Mexico. MD 853. Maryland Route 853 is the unsigned designation for four sections of old alignment of MD 194 between Taneytown and the Pennsylvania state line in northwestern Carroll County. MD 855. Maryland Route 855 is the unsigned designation for a pair of unnamed highways that are pieces of old alignment  of MD 213 (Augustine Herman Highway) in Kent County. MD 856. Maryland Route 856 is the unsigned designation for Old Lynch Road, which runs between a pair of intersections with MD 298 just east of that highway's intersection with MD 561 at Lynch in northern Kent County. The road was constructed as part of MD 298 as a concrete road in 1930. Old Lynch Road was bypassed when MD 298 was relocated to a smoother curve when the highway was widened in 1951 and 1952. The highway received the MD 856 designation in 1959. MD 863. Maryland Route 863  (officially MD 863A) is the unsigned designation for the unnamed service road that closely parallels the northbound direction of MD 5 from north of MD 6 to south of Golden Beach Road in Charlotte Hall. The route provides access to a farmers market. MD 864. Maryland Route 864 is the unsigned designation for Bessicks Corner Road, which runs between a pair of intersections with MD 292 on either side of county-maintained Bessicks Corner Road west of Still Pond in northern Kent County. The road was originally constructed by Kent County with state aid as part of the macadam road  between Still Pond and Betterton by 1915, and MD 292 from Still Pond to Betterton was widened in 1948. MD 864 was assigned to its present course when MD 292 was moved to its smoother curve as part of a 1968 resurfacing project. MD 868. Maryland Route 868 (officially MD 868G) is the designation for the section of Stone Corner Lane, a spur of old alignment of MD 234 that heads east from MD 236 in Budds Creek. MD 870. Maryland Route 870 (officially MD 870G) is the designation for the unnamed section of the old alignment of  US 40 (now MD 144) adjacent to Exit 56 of I-70 in Frederick. The state highway connects MD 144 (officially MD 144FA) with the ramp from westbound I-70 to MD 144, an emergency ramp onto westbound I-70, and to Bowmans Farm Road, which serves a pair of farms, the Frederick County Sheriff's Office, and the Maryland Motor Vehicle Administration's Frederick center. MD 870G is one-way westbound between a two-way spur to MD 144 and its western end tangent to MD 144. MD 871. Maryland Route 871 is the designation for a pair of sections of  old alignment of MD 17 in Rosemont. MD 872. Maryland Route 872 is the designation for the unnamed service road that parallels the westbound direction of US 340 west from MD 180 near Petersville. MD 874. Maryland Route 874 is the designation for two sections of old alignment of MD 75 between New Market and New London in eastern Frederick County. MD 877. Maryland Route 877 (officially MD 877B) is the designation for East Baldwin Road, a service road that heads east from a right-angle turn in MD 75 just south of that highway's interchange with I-70 in  New Market. MD 877 curves northeast then parallels the eastbound direction of I-70 to its end at a farm. MD 879. Maryland Route 879 is the designation for five sections of old alignment of MD 91 between Gamber and Finksburg in eastern Carroll County. MD 889. Maryland Route 889 is the unsigned designation for an unnamed road running from a dead end near a SHA garage south to MD 137 in Hereford, Baltimore County. The route is long. MD 894. Maryland Route 894 is the designation for Limestone Road, a section of old alignment of US 522 from MD 144  north to a ramp from southbound US 522 in Hancock. MD 896. Maryland Route 896, which is known as Mechanicsville Road, runs from the Delaware state line west and north to the Pennsylvania state line in far northeastern Cecil County. The two-lane highway, whose only intersection is with Little Egypt Road, connects Delaware Route 896, which heads southeast into Newark, with Pennsylvania Route 896, which heads northwest toward Strickersville. The highway was constructed as a concrete road in 1925 as Maryland's very short portion of the highway between Newark and the Lincoln Highway near Lancaster. The state highway  was originally designated Maryland Route 278. The Delaware and Pennsylvania routes were numbered 896 by 1938. MD 278's designation was changed to MD 896 between 1940 and 1946. MD 899. Maryland Route 899 is the designation for American Way, a road in Quince Orchard, Montgomery County that runs from its end to Cherry Grove Drive, with ramps to Maryland Route 28 along the way. The route is long. Maryland Route 899A is another section of the American Way, long, branching from MD 28 to its end.