The Fishtrap Creek watershed is located in the southwest portion of the City, west beyond Ross Road, north to Blueridge Drive and east to Trethewey Street. The total catchment area is an estimated 3,000 hectares.
Fishtrap Creek detention areas were originally built as a large stormwater management facility to minimize the downstream flooding caused by urbanization as a significant portion of the watershed is within the City's Urban Development Boundary. The watershed includes the Abbotsford International Airport, and drains south to the United States.