Arkansas Highway 170
|Maintained by AHTD|
|Length:||17.31 mi (27.86 km)|
|South end:||AR 74 / AR 220, Devil's Den State Park|
|North end:||US 71, West Fork|
|Length:||5.44 mi (8.75 km)|
|South end:||US 62, Walnut Grove|
|North end:||US 62, Farmington|
Arkansas Highway 170 is a designation for two state highways in Washington County, Arkansas. The main segment of 17.31 miles (27.86 km) runs from Devil's Den State Park to West Fork. A shorter segment of 5.44 miles (8.75 km) runs from US Route 62 through Appleby before reconnecting with US 62.
Devil's Den State Park to West Fork
AR 170 begins at a three-way junction with AR 74 and AR 220 in Devil's Den State Park. The route runs north, winding through steep Ozark topography. AR 170 serves as the southern terminus of AR 265 near the SEFOR reactor. The highway continues north through rural country, crossing over I-49. East of the expressway, AR 170 enters West Fork. The route enters town as Phillips St, turns south onto McKnight St, and turns left onto Main St.  AR 170 continues to US Route 71, where the route terminates.
Walnut Grove to Farmington
The entire route is in Washington County.
|Devil's Den State Park||0.0||0.0||AR 74 east / AR 220 south (Lee Creek Rd)||AR 74/AR 170/AR 220 termini|
|5.9||9.5||AR 265 north||AR 265 southern terminus|
|West Fork||14.8||23.8||AR 156 west (Hogeye Rd)||AR 156 eastern terminus|
|15.0||24.1||I-49 – Fort Smith, Fayetteville|
|16.4||26.4||US 71 (Centennial Ave)||northern terminus|
|AR 170 begins in Walnut Grove|
|Walnut Grove||0.0||0.0||US 62||southern terminus|
|Farmington||5.44||8.75||US 62 (E Main St)||northern terminus|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
AR 170 follows the original 1926 alignment of AR 45 which later became US 62.
- "[Arkansas] State Highways 2009 (Database)." April 2010. AHTD: Planning and Research Division. Database. Retrieved May 24, 2011.
- General Highway Map - Washington County, Arkansas (PDF) (Map) (10/3/2008 ed.). Arkansas State Highway and Transportation Department. Retrieved May 24, 2011.
- Map of West Fork, Washington County, Arkansas (Map) (June 1995 ed.). Arkansas State Highway and Transportation Department. Retrieved May 24, 2011.