The Hāna Highway is a 68-mile (109 km) long stretch of Hawaii State Routes 36 and 360 which connects Kahului with the town of Hāna in east Maui. On the east after Kalepa bridge, Hana Highway continues to Kīpahulu as Route 31 (Piilani Highway), the first section of which is unofficially considered to be part of Hāna Highway. Although Hāna is only about 52 miles (84 km) from Kahului, it takes about 2.5 hours to drive when no stops are made as the highway is very winding and narrow and passes over 59 bridges, 46 of which are only one lane wide. There are approximately 620 curves along Route 360 from just east of Kahului to Hāna, virtually all of it through lush, tropical rainforest. Many of the concrete and steel bridges date back to 1910 and all but one are still in use. That one bridge, badly damaged by erosion, has been replaced by a parallel structure by a portable steel ACROW bridge erected by the United States Army Corps of Engineers.
In August 2000 it was designated as the "Hana Millennium Legacy Trail" by President Bill Clinton, with the trail start designated in Pāʻia. The Hāna Highway is listed on the National Register of Historic Places on June 15, 2001.