The highway travels through the northeast corner of this huge park almost to Fort Smith on the NWT/Alberta border. Wood Buffalo is a UNESCO World Heritage Site, and at 44,800 km2 /17,300 miles2 Wood Buffalo is the largest national park in North America.
Pavement ends here. Moose, Wood bison, black and brown bears and snowshoe hares can often be seen along the highway. Lynx also make their homes in the park. The endangered Whooping Crane and its cousin, the more common and less shy Sandhill Crane nest here. Beavers are common in the wetlands, and in 2007 the world's largest beaver dam (about 850 metres (2,790 ft)) was discovered using satellite imagery. The dam is located south of the NWT border.