Breaksea Island is a rugged 1.6 km2 (1 sq mi) island in the southwest of New Zealand, and is part of Fiordland National Park. Its highest point is 350 m (1,148 ft) asl and it lies about 2 km (1.2 mi) from the mainland in the entrance to Te Puaitaha / Breaksea Sound, north of the much larger Resolution Island. It is covered in temperate rainforest and was the site of one of the first successful campaigns to eradicate rats from a sizeable island.