Beach WA 411 is located on the eastern side of Isthmus Hill and is a curving 500 m long lower energy beach with waves averaging about 0.5 m. These permit seagrass to grow close inshore, with seagrass debris littering much of the beach. It is bordered and backed by steeply rising vegetated slopes composed of calcarenite covered granite. A walking trail runs along the crest of the 100-150 m high backing ridge, with a track down to the rocks at the eastern end of the beach. The southern shores of Torndirrup National Park faces into the high waves and strong winds of the Southern Ocean. The waves are reduced slightly by the offshore Eclipse islands, as well as some inshore rocks and islets, and closer to shore by some of the headlands. The winds however remain strong and have blanketed the entire southern shoreline with multiple layers of Pleistocene dune calcarenite, anchored by the ancient massive granite that forms the base of all the headland and points. The calcarenite has blown up and over the granite and up to 6 km inland in lee of Sand Patch Beach. It averages over 100 m in height and reaches a maximum height of 230 m at Limestone Head on Flinders Peninsula. The first 16 km of shoreline between Bald Head and Cave Point contains eight beaches (WA 412-419). Isthmus Bay occupies most of the southern side of Flinders Peninsula, with Bald Head forming the eastern boundary. The exposed south-facing, 2.5 km long bay contains two beaches (WA 412 & 413). The beaches can only beach reached on foot along the Isthmus Hill track, with a steep descent down to each beach. read more

Beach Length: 0.5km