Hawaii Route 37 is a 26.6 mile road on the island of Maui in Hawaii. Its northern terminus is with Route 36, where it heads eastward as Haleakala Highway. At the junction with Route 377, it becomes the Kula Highway, until its southern terminus with Route 31. A short 1.6 mile section of the Kula Highway between Thompson and Kamaole Roads is also called Ulupalakua Road.