Arkansas Highway 166
# Arkansas Highway 166

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

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 (Future I-57) 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 |
| - | - | - | - | - |
| Davidsonville Historic State Park | 0.0 | 0.0 | Roadway continues as AR 361 – Black Rock | southern terminus, AR 361 northern terminus |
| Pocahontas | 7.97 | 12.83 | US 62 west – Imboden | northern terminus |
| Gap in route |||||
| Pocahontas | 0.0 | 0.0 | US 62 east / US 67 north – Corning | southern terminus |
| Stokes | 7.47 | 12.02 | AR 115 south – Pocahontas | |
| AR 115 concurrency north, 4.9 miles (7.9 km) |||||
| Maynard | 0.0 | 0.0 | AR 115 north / AR 328 west – Doniphan MO, Maynard Pioneer Museum | AR 328 concurency east |
| Maynard | 0.47 | 0.76 | AR 328 east – Reyno | AR 328 concurrency ends |
| ​ | 7.10 | 11.43 | Route A / Route Y | Continuation into Missouri |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus |||||
