Although the iconic floating markets in Thailand have been promoted both domestically and internationally, without a well-planned tourism initiative, virtually all of them have lost their authenticity. To preserve the culture of the Don-Manora floating market, this study aimed to enhance local participation in tourism planning in the Samut Songkhram province. There were 720 stakeholders involved in this study. The Don-Manora tourism planning and development initiated during this study including the foundation of Don-Manora tourism committees, the creation of a home stay group among 12 households, and the discussion of tourism rules and regulations among interested participants. The evidence shows that local participation in tourism increased dramatically during the planning process.