Nelson Kootenay Lake has become a popular attraction for scuba divers. There is an abundance of fresh water diving and wreck diving available, including the Proctor Boxcars just north of Balfour. Located just past the mouth of the west arm, 5 railway boxcars are buried 45 metres below the surface after a barge sunk in rough weather in 1901. A 6th boxcar can also be found at 6 metres depth.
Ainsworth is another popular spot for junk divers, with historic memorabilia scattered at depths of 6-39 metres. Most relics lie above 18 metres, including old bottles and mementos from residents of the historic mining community. The S.S. City of Ainsworth which sank back in 1898 also lies about 40 metres below the surface and is a provincially-designated underwater heritage site.
Wall and reef divers can also visit Sawmill Reed on the east shore of Kootenay Lake and Verandah Point on the northeast edge of Campbell Bay. West Kootenay Scuba is a PADI Dive Centre based in Salmo which operates guided tours, instruction courses and has a well-stocked gear shop.