Indian Arm Provincial Park, Provincial park in British Columbia, Canada

Say Nuth Khaw Yum Provincial Park, also called Indian Arm Provincial Park, covers 6,689 hectares of forested mountains around Indian Arm, an 18-kilometre fjord north of Burrard Inlet. Its slopes rise from sea level to about 1,000 metres, with mountain lakes, creeks and waterfalls such as the 50-metre Granite Falls and Silver Falls. The park also takes in Buntzen Lake, Croker Island and the Twin Islands.

The park was established on July 13, 1995, to protect the old-growth forests of Indian Arm from logging, including helicopter logging, and from damage by unregulated recreation. The Tsleil-Waututh First Nation was not involved in its creation, but in 1998 signed a cooperative management agreement with British Columbia. In February 2010 the park was renamed Say Nuth Khaw Yum, meaning "Serpent's Land" in Halkomelem.

The park's name, Say Nuth Khaw Yum, means "Serpent's Land" in Halkomelem, the language of the Tsleil-Waututh First Nation. The nation has used the area for around a thousand years as the core of its settlement territory. A 1998 agreement made the park jointly managed by the Tsleil-Waututh and BC Parks.

The park is reached mainly by boat; a forest road into it is closed to the public. The eastern section is accessible through the Buntzen Lake Recreation Area, whose trail system is mostly rated moderately difficult. The fjord suits motorboats, canoes, kayaks and scuba diving.

The park holds protected archaeological sites of the Tsleil-Waututh that cannot be visited. In some autumns up to 60,000 pink salmon run into Indian Arm, and the salmon migration draws bald eagles and seals. Twin Islands became a provincial recreational reserve as early as 1905.