Château-Arnoux-Saint-Auban Airfield (ICAO: LFMX) is a small general aviation aerodrome located near the town of Château-Arnoux-Saint-Auban in the Alpes-de-Haute-Provence department of southeastern France. It sits in the Durance River valley, surrounded by the mountainous landscape characteristic of this part of Provence. The airfield serves private pilots, recreational flying clubs, and light aircraft operations rather than scheduled commercial airline services. It holds no IATA code, reflecting its status as a non-commercial facility. The surrounding region is known for gliding and light aviation activity due to favorable thermal conditions generated by the Alpine terrain.