Visible in this southwest-looking, low-oblique photograph is the northern end of Lake Oahe [250 miles (403 kilometers) long], which ends approximately 6 miles (10 kilometers) from Bismarck, the capital of North Dakota (barely discernible at right center). Bismarck, located on rolling hills overlooking the Missouri River, is a trade and distributing point for spring wheat, livestock, and dairy products. Food items, farm machinery, and wood and concrete products are also manufactured. Bismarck is the center for development of the rich oil reserves of the Williston Basin. Hook-shaped, ice-covered Long Lake and Long Lake National Wildlife Refuge are visible (bottom center). Much of Lake Oahe is also ice covered.