NOLS is a non-profit outdoor education school based in the United States dedicated to teaching environmental ethics, technical outdoor skills, wilderness medicine, risk management and judgment, and leadership on extended wilderness expeditions and in traditional classrooms. It was previously known as the National Outdoor Leadership School, but in 2015, this label was retired in favor of the independent "NOLS". The "NOLS" mission is to be the leading source and teacher of wilderness skills and leadership that serve people and the environment. NOLS runs courses on six continents, with courses in a variety of wilderness environments and for almost any age group.

Outdoor education is organized learning that takes place in the outdoors, typically during school camping trips. Outdoor education programs sometimes involve residential or journey wilderness-based experiences in which students participate in a variety of adventurous challenges and outdoor activities such as hiking, climbing, canoeing, ropes courses and group games. Outdoor education draws upon the philosophy, theory, and practices of experiential education and environmental education.