Hawaii Route 30, also known as the Honoapi'ilani Highway, is a 35-mile-long (56 km) road on West Maui, Hawaii. It begins in downtown Wailuku, extending south through Waikapu and Maalaea. The Olowalu Tunnel, located at mile 10.4, is 318 feet (97 m) long. Following terrain of the island, the highway circumvents the West Maui Forest Reserve connecting Olowalu, Launiupoko, Lahaina, Kahana, through the regions of Kapalua and Honolua, and ending in Honokohau Bay. At this point the road continues as the Kahekili Highway, a "notoriously narrow and twisty" county-maintained road covering the northern coastline of West Maui and eventually terminating back in Wailuku. The eastern part of Kahekili Highway is signed as Hawaii Route 340. The two highways together, plus a short stretch of Hawaii Route 32, complete the circular journey around West Maui. From Wikipedia
