Arkansas Highway 166

Highway 166
Route information
Maintained by AHTD
Section 1
Length:	7.97 mi (12.83 km)
South end:	AR 361, Old Davidsonville State Park
North end:	US 62, Pocahontas
Section 2
Length:	14.57 mi (23.45 km)
South end:	US 62 / US 67, Pocahontas
North end:	Route A / Route Y, Missouri state line
Location
Counties:	Randolph
Highway system
Arkansas Highway System Interstate US State Business Spurs Scenic Heritage Trails ← US 165 US 167 →

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.

Route description

Davidsonville Historic State Park to Pocahontas

Highway 166 near Davidsonville Historic State Park

AR 166 begins at Davidsonville Historic State Park in southwest Randolph County. The route runs north to meet US Route 62 in south Pocahontas. The route is entirely two-lane, undivided.

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.

Major intersections

Mile markers reset at concurrencies. The entire route is in Randolph County.

Location	mi	km	Destinations	Notes
Old Davidsonville State Park	0.0	0.0	AR 361 south	southern terminus, AR 361 northern terminus
Pocahontas	7.97	12.83	US 62	northern terminus
	AR 166 begins at US 62/US 67
	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