State Route 39 (SR-39) is a state highway in northern Utah connecting Ogden to Woodruff via Ogden Canyon and Huntsville. The highway is locally designated as 12th Street in Ogden and the Ogden River Scenic Byway through Ogden Canyon. The route is 67.7 miles (109 km) long. Prior to 1964, SR-39 was routed along 24th Street and Harrison Boulevard in Ogden. A change in the route moved the route north to 12th Street.