This study explores the motivations of sports tourists and their companions in participating in rowing activities within Thailand’s Eastern Economic Corridor (EEC). Water-based sports tourism, such as rowing, has increased in popularity due to its integration of physical activity with natural environments. A quantitative research design was employed, using structured questionnaires to assess five key motivational categories: physical health, personal achievement, social interaction, psychological well-being, and experiential enjoyment. A total of 200 participants, including sports tourists and their companions, were surveyed at various rowing events in the EEC. Results show high motivation levels across all categories, with experiential motivation being the most significant factor, followed by physical health and personal achievement. These findings underscore the importance of promoting rowing as an activity that addresses both physical and psychological needs while fostering social connections. Future research could explore how these factors influence long-term participation and retention in sports tourism.