The Gardner Pinnacles (Hawaiian: Pūhāhonu) are two barren rock outcrops surrounded by a reef and located in the Hawaiian Islands at (24°59′56″N167°59′58″W), 511 nautical miles (946 km; 588 mi) northwest of Honolulu and 108 miles (94 nmi; 174 km) from French Frigate Shoals. The total area of the two small islets—remnants of an ancient volcano—is 5.939 acres (24,030 m²). The highest peak is 170 feet (52 m).