<section begin=Lead /> 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. Cultus Lake is located south of the Chilliwack River, near the city of Chilliwack and approximately 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. At one time the lake had a sawmill and booming ground until it became a provincial park in the 1950s.<section end="Lead" />
Cultus Lake is an important place for spirit quests of the people. The traditional TsâÂÂelxwéyeqw name for the lake is SwÃÂlhchaâ meaning âÂÂan empty basin that quickly filled with waterâ or âÂÂsomebody diedâÂÂ. Cultus is a Chinook Jargon word meaning primarily bad, worthless, or good for nothing, though the same word can also mean free, without purpose, or simply nothing. It possibly acquired this name after the spiritual power of the lake was used up owing to its popularity.
Recreation facilities include Cultus Lake Waterpark and the Cultus Lake Adventure Park, which opened in July 2014 as the expansion of Giggle Ridge Adventure Golf.
British Columbia Parks has several camping sites in the area in addition to a few privately owned campgrounds.
In the early 1900s, the Cultus Lake area was a popular destination, which led to the formation of a joint committee between the City of Chilliwack and the Corporation of the Township of Chilliwhack (sic) in 1924. This then led to the formation of the Cultus Lake Park Board in 1932, which is still in effect today. The Cultus Lake Park Board includes five commissioners, of whom 3 are elected from Cultus Lake, and 2 from the City of Chilliwack. As of 2022, the board chairman is Kirk Dzaman.
Cultus Lake Community School has approximately 150 students from Kindergarten to Grade 6. The school was first opened in 1947 as a three-room schoolhouse. It was destroyed by a fire in February 1959; the current building opened in October of the same year. The school is administered by the Chilliwack School District.