This paper sought to examine the motivational patterns of mountaineers that motivate them to engage in mountaineering, their environmental awareness and environmental engagement. This thesis also attempts to determine the relationship between mountaineers' motivational patterns and their environmental attitudes and behavior. The survey was conducted on a sample of 812 mountaineers from all over Croatia, and an online questionnaire was distributed via email and Facebook. Descriptive processing has shown that mountaineers are mainly motivated by the contact with the natural environment, the possibility of personal development and the need for freedom and relaxation. Results also show high level of ecological awareness and ecological engagement of mountaineers. Female mountaineers have shown greater motivation for factors of personal development and contact with nature, freedom and relaxation. Furthermore, female mountaineers also show greater levels of environmental awareness. There was also a statistically significant correlation between mountaineering motivations and environmental attitudes and environmental engagement. There was also a statistically significant correlation between the intensity of hiking the last 12 months, environmental attitudes and environmental engagement, as well as the relationship between ecological attitudes and engagement. The results of this paper indicate the sustainable character of the current lever of hiking in Croatia, as well as the need for further research and monitoring of the direction of hiking development.