The West Arm Provincial Park extends along the shore of Kootenay Lake from Nelson to Harrop, and up to the peaks behind. The creek fans and pocket beaches are popular with boaters and there is a historic trail (not maintained) up Lasca Creek.
The park is largely undeveloped and important for its bio-diversity value as the natural habitat for several endangered species, while also protecting Nelson’s water source.
There are sites for short-term camping, which are accessible by boat. They are available on a first-come, first-served basis; campsites are user-maintained. There are beach picnicking areas in the park.
This park was identified for protection in the West Kootenay Boundary Land Use Plan.