49°29′10″N 123°58′10″W / 49.48611°N 123.96944°W
South Thormanby Island (sx̱welap in she shashishalhem) is an island off the Sunshine Coast of British Columbia, Canada, located 17 km west of Sechelt, and within the shared territories of the Tla'amin Nation and the shíshálh Nation.
Simson Provincial Park, established in 1986 and named after pioneer Calvert Simson,[1] occupies the majority of the southern part of South Thormanby Island. The northern half of the island is predominately private property, with a concentration of seasonal cottages along Buccaneer Bay and Water Bay.[2]