Maryland Route 66 | ||||
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Maryland Route 66 highlighted in red
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Route information | ||||
Maintained by MDSHA and Town of Smithsburg | ||||
Length: | 12.84 mi (20.66 km) | |||
Existed: | 1927 – present | |||
Major junctions | ||||
South end: |
US 40 Alt. in Boonsboro |
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US 40 in Beaver Creek |
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North end: | MD 64 near Smithsburg | |||
Location | ||||
Counties: | Washington | |||
Highway system | ||||
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US 40 in Beaver Creek
I-70 in Beaver Creek
Maryland Route 66 (MD 66) is a state highway in the U.S. state of Maryland. Known for most of its length as Mapleville Road, the state highway runs 12.84 miles (20.66 km) from U.S. Route 40 Alternate (US 40 Alternate) in Boonsboro north to MD 64 near Smithsburg. MD 66 parallels the western flank of South Mountain in eastern Washington County, connecting Boonsboro and Smithsburg with Interstate 70 (I-70) and US 40. MD 66 was constructed in the late 1920s and early 1930s from Boonsboro to Cavetown. The state highway was extended north through Smithsburg after MD 64 bypassed the town in the late 1950s.