North Cascades National Park is managed by the National Park Service, and the park headquarters is in Sedro-Woolley, Washington. The park consists of a northern and a southern district or unit. These are separated by Ross Lake National Recreation Area. The southeast boundary of the southern district abuts Lake Chelan National Recreation Area; the park and two recreation areas are managed as the North Cascades National Park Complex. Most of the park complex was designated as the Stephen Mather Wilderness, preventing further human-induced alterations to 93 percent of the park. The mandate of the National Park Service is to preserve and protect natural and cultural resources. In keeping with this mandate, hunting is illegal in the park, as is mining, logging, oil and gas extraction, and removal of natural or cultural resources.