Rosa Blanche Mountain Landing Site (ICAO: LSYR) is a small, high-altitude landing area located on a ridge south of the Rosa Blanche summit in the canton of Valais, Switzerland. It is used primarily for mountain flying, rescue operations, and specialized alpine aviation activities rather than commercial passenger service. The site is characteristic of Switzerland's network of mountain airstrips and helipads that support search and rescue, glacier access, and alpine tourism. Operations at such locations require specialized pilot training and certification due to the extreme terrain, altitude, and weather conditions typical of high Alpine environments.