De Mamiel Creek is a small but historically productive salmon stream located in the Sooke District of British Columbia, flowing southeast into the Sooke River near its mouth. The creek drains a watershed that was logged approximately 15 years prior to early fisheries surveys, and has since developed a good stand of riparian vegetation. The streambed composition includes bedrock, boulder, coarse material, and silt and sand substrates, giving the creek a varied character that supports multiple salmon species across different sections. A storage dam was constructed at Young Lake in 1970 to ensure a minimum flow of 0.5 cubic feet per second throughout the summer months, helping maintain habitat conditions during low-flow periods.