The Wilderness Medical Society was created on 15 February 1983 by three physicians from California, United States — Dr. Paul Auerbach, Dr. Ed Geehr, and Dr. Ken Kizer. It is the largest international non-profit membership organization devoted to addressing wilderness medicine challenges, more specifically defined as "medical care delivered in those areas where fixed or transient geographic challenges reduce availability of, or alter requirements for, medical or patient movement resources". It also publishes Wilderness & Environmental Medicine Journal, Wilderness Medicine Magazine, and Wilderness Medicine Clinical Practice Guidelines.

Wilderness medicine is a medical specialty concerned with medical care in remote, wilderness and expedition environments. The specialty includes prior planning, public health issues, a number of sub-specialties as well as responding to emergencies. One modern definition of wilderness medicine is "medical care delivered in those areas where fixed or transient geographic challenges reduce the availability of, or alter requirements for, medical or patient movement resources".