Tweedsmuir South Provincial Park is a provincial park covering parts of the eastern Kitimat Ranges, northern Pacific Ranges, and the Rainbow Range in British Columbia, Canada. It was established on May 21, 1938 in the western interior of the province, to protect its important natural features. Tweedsmuir Provincial Park is located on the unceded ancestral territory of the Nuxalk Nation. The park hosts a variety of recreation activities for visitors. This park encompasses a range of diverse species in this park including bears, moose, and various fish. There are also a few at risk species in this park.