Ross Lake National Recreation Area is a US National Recreation Area located in north central Washington just south of the Canada-US border. It is the most accessible part of the North Cascades National Park Complex which also includes North Cascades National Park and Lake Chelan National Recreation Area. Ross Lake NRA follows the Skagit River corridor from the Canada-US border to the western foothills of the Cascades. The NRA contains a portion of scenic Washington State Route 20, the North Cascades Highway, and includes three reservoirs: Ross Lake, Diablo Lake, and Gorge Lake. These reservoirs make up the Skagit Hydroelectric Project operated by Seattle City Light. Nestled in the American Alps the Ross Lake NRA bisects the north and south units of North Cascades National Park.