. "State Route 366 (SR 366) is a highway in Graham County, Arizona that runs from its junction with US 191 south of Safford to near the summit of Mount Graham. It is a winding mountain road with one half primarily a northwest-southeast route, the other half being northeast-southwest."@en . "SR" . "Mount Graham Road"@en . "45592.7"^^ . "366" . "East" . "West" . .