Flying in these enticing environments often entails operations over relatively inaccessible terrain in a challenging and sometimes unforgiving environment. This necessitates the proper mindset, discipline, and procedures to operate efficiently and safely. Operating over mountains, navigating through canyons, taking off and landing on unimproved, high-altitude airstrips in confined areas, and maximizing airplane performance requires specialized skills. The authors and guest writers share information and tips gleaned from more than 150 years and 100,000 hours of collective experience as professional mountain and backcountry pilots and flight instructors.