Arkansas Highway 166
|Maintained by AHTD|
|Length:||7.97 mi (12.83 km)|
|South end:||AR 361 at Davidsonville Historic State Park|
|North end:||US 62 in Pocahontas|
|Length:||14.57 mi (23.45 km)|
|South end:||US 62 / US 67 in Pocahontas|
|North end:||Route A / Route Y at Missouri state line|
Arkansas Highway 166 is a designation for two state highways in Randolph County, Arkansas. The southern segment of 7.97 miles (12.83 km) runs from Old Davidsonville State Park to Pocahontas. A northern segment of 14.57 miles (23.45 km) runs north from US 62/US 67 to the Missouri state line.
Davidsonville Historic State Park to Pocahontas
Pocahontas to Missouri
AR 166 begins at US 62/US 67 in east Pocahontas. The route runs north to meet AR 115 at Stokes and AR 328 in Maynard. AR 166 then trails north through Supply and Minorea to the Missouri state line, where it terminates at Missouri supplemental routes A/Y.
Mile markers reset at concurrencies. The entire route is in Randolph County.
|Davidsonville Historic State Park||0.0||0.0||Roadway continues as AR 361||southern terminus, AR 361 northern terminus|
|Pocahontas||7.97||12.83||US 62||northern terminus|
|Gap in route|
|0.0||0.0||US 62 / US 67||southern terminus|
|Stokes||7.47||12.02||AR 115 south|
|AR 115 concurrency north, 4.9 miles (7.9 km)|
|Maynard||0.0||0.0||AR 115 north / AR 328 west||AR 328 concurency east|
|||0.47||0.76||AR 328 east||AR 328 concurrency ends|
|Arkansas/Missouri state line||7.10||11.43||Route A / Route Y||northern terminus|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi