Fraser Lowland

Fraser Lowland
Lowland
Landsat image of the Fraser Lowland, which stretches from Chilliwack in the northeast to the Strait of Georgia in the southwest. Sediment deposited by the Fraser River is clearly visible.
Fraser Lowland
Coordinates: 49°2′N 122°34′W / 49.033°N 122.567°W / 49.033; -122.567
Location	British Columbia, Canada Washington, United States
Part of	Georgia Depression

The Fraser Lowland is a landform and physiographic region in the Pacific Northwest of North America, shared between the Canadian province of British Columbia and the U.S. state of Washington. The region includes much of the Lower Mainland region of British Columbia, and the coastal plains of Washington's Whatcom County. As a physiographic region, the Fraser Lowland is part of the Georgia Depression, which in turn is part of the Coastal Trough.^[1][2]

The eponymous Fraser River in the Lowland's north and the lower basins of its tributaries (mainly the Pitt River, Coquitlam River and Vedder/Chilliwack Rivers), as well as the entire catchment of the oppositely flowing Sumas River, are the Lowland's primary river system.

However, the region also includes the lower Nooksack River basin ("Nooksack Lowland") south of the Canada–US border, which belongs to a completely separate river system arising from the southeast in the namesaked valleys around the North Cascades' Mount Shuksan, Baker and Twin Sisters.

Overall, the Fraser Lowland encompasses all the fertile low-lying fluvial plains between and around the Fraser and Nooksack rivers,^[3] including the Sumas Prairie, the Burrard Peninsula, and sometimes also the North Shore lowlands around the Burrard Inlet.

The American pene-exclave of Point Roberts lies to the region's west, at the southern end of the Tsawwassen peninsula.