The adventure tourism sector is characterized by innate risks, making the Occupational Safety and Health (OSH) risk perception of its workers a critical element in preventing accidents. Understanding what workers perceive as high-risk is fundamental to elaborating effective safety management systems. This study aimed to identify and analyze the OSH risk perceptions among workers in the adventure tourism sector in Yogyakarta, Indonesia. A semi-quantitative, cross-sectional survey was conducted with 68 adventure tourism workers. Participants rated the consequences and likelihood of 43 specific hazards related to their work environment, equipment, and human factors. The data was analyzed using descriptive statistics to identify the highest and lowest perceived risks. Preliminary findings indicate the highest overall risks perceived by workers involve human factors and equipment deficiencies. These include dealing with inexperienced tourists, the presence of untrained seasonal workers, poor physical condition of participants, slips, trips, and falls from height, and the use of improper or substandard equipment. Hazards perceived to have the most severe consequences are primarily systemic failures, such as the failure to provide for extreme conditions, the use of substandard equipment, the absence of required safety equipment, and the failure to inspect and maintain equipment. In terms of frequency, workers most often reported experiencing business pressure to operate under any circumstances and dealing with inexperienced tourists. These results highlight a pressing need for focused interventions, including comprehensive tourist briefings, mandatory training for all staff, rigorous equipment safety protocols, and the establishment of a stronger safety culture to mitigate the most prominent risks in the adventure tourism industry.