Cultus Lake Park is a lake and associated community and provincial park in the Fraser Valley region of British Columbia, Canada. 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 (7 miles) south of the Chilliwack River, near the city of Chilliwack and approximately 80 kilometers (50 miles) 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.
Cultus Lake has always been an important place for spirit quests of the Stó:lo people. Because of the bad spirits which native tradition says live in the lake, it was named with the Chinook Jargon word meaning bad.