Cultus Lake is a lake, associated community and provincial park in the Fraser Valley region of British Columbia, Canada. It is the source of the Sweltzer River. The lake itself is warm, and the area has become a popular recreation destination with ample opportunities for fishing, water skiing, wind surfing, and hiking. Cultus Lake is located 11 kilometers (6.8 mi) south of the Chilliwack River, near the city of Chilliwack and approximately 80 kilometers (50 mi) east of Vancouver. In 1950, Cultus Lake became a Provincial Park of British Columbia. Cultus Lake covers an area of 656 hectares, evenly on either side of the lake.