People's perceptions of their environment in high mountain rangelands ultimately affect the fragile ecosystems on which they depend, and thus their welfare. This is especially true in developing countries, where the livelihoods of people living in such ecosystems depend on grazing livestock. The present study, conducted in the central mountain region of Peru, used photographs and Q methodology to investigate the criteria and preferences that shepherds and local administrators apply in making grazing management decisions. The results showed 2 different sets of criteria and preferences. In the first set of preferences the condition of the grassland, particularly the height of the vegetation, was the main criterion. In the second set, the color of the vegetation was the key criterion. We discuss implications for the further use of this methodology.