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 U.S. Route 62 (US 62) through Appleby before reconnecting with US 62.

U.S. Route 62 is a U.S. highway running from El Paso, Texas northeast to Niagara Falls, New York. In the U.S. state of Arkansas, the route runs 329.9 miles from the Oklahoma border near Summers east to the Missouri border in St. Francis, serving the northern portion of the state. The route passes through several cities and towns, including Fayetteville, Springdale, Bentonville, Harrison, Mountain Home, Pocahontas, and also Piggott. US 62 runs concurrent with several highways in Arkansas including Interstate 49 and U.S. Route 71 between Fayetteville and Bentonville, U.S. Route 412 through much of the state, U.S. Route 65 in the Harrison area, and with U.S. Route 63 and U.S. Route 67 in northeast Arkansas.