Mountaineering tourism in Mount Rinjani National Park has various potential natural hazards and requires improved mitigation to ensure tourism security and sustainability. The purpose of this research is to identify the perceptions of tourism actors on the tourism hazards, inventory the types of tourism hazards that occur and mitigate the hazards that have been carried out, and develop tourism hazard mitigation. The methods used in this research are interviews, field observations, and literature studies. Public perceptions of the mountaineering tourism hazard are included in the good category, which means people already know and understand the type and risk of hazard tourism. The types of tourism hazards that have occurred are earthquakes, landslides, volcanic activity, fires, ravines, slippery ravines, cold temperatures, fog, wildlife, and plant hazard. The mitigation that has been carried out consists of mitigation before the hazard event and after the hazard event. Mitigation efforts are divided into regulations, facilities and infrastructure, education, and awareness programs. It is necessary to improve mitigation through addition and improvement of climbing procedures and hazard management procedures, improvement of hiking hazard maps, improvement quality of facilities to minimize damage, making secure infrastructure as a means of warning, security, and emergency response, and socialization/education-related hazard mitigation and how to deal with it.