The Mackenzie Timber Supply Area covers 6.1 million hectares in northeast British Columbia. There is a wide variety of topography in the Mackenzie Timber Supply Area. The Rocky Mountain Trench, with its flat to gentle terrain, runs north south through the center of the timber supply area, with the rugged Rocky Mountains on the east side and the more rounded Omineca Mountains to the west. Williston Lake, a narrow 360 kilometre long lake created by the W.A.C. Bennett Dam on the Peace River, is one of the most prominent geographical features in the area. The lake serves as a major access route to the interior of the timber supply area and is used to transport logs to the mills in Mackenzie.
Steep terrain and sensitive soils are widespread in the mountain areas. The climate and ecology are very diverse because of the mountainous terrain and the high precipitation common in interior mountain areas. These conditions create a variety of ecosystems ranging from rich, moist, floodplains in valley bottoms to high-elevation alpine meadows.
