<![CDATA[The migration of the Dayak Bahau Tribe from Muyub Aket Village to Tukul Village, West Kutai Regency, during the period 1825–2025 is a complex phenomenon involving social, cultural, and economic dynamics. This research aims to reconstruct the history of migration, identify the driving factors, adaptation mechanisms, and socio-cultural impacts that arise. The research method used a qualitative approach, with in-depth interviews, participatory observations, and local historical documentation studies, involving six key informants who had in-depth knowledge about migration. The results show that migration occurs in three waves, influenced by Dutch colonial pressures, environmental conditions, local beliefs, and the need for fertile land. The migration process is carried out collectively through customary meetings, fair land distribution, and gradual settlement development. From a socio-economic perspective, the community maintains traditional livelihoods such as farming, selling rattan, and fishing, while integrating modern jobs such as civil servants, honorary, and mining. The socio-cultural aspect is maintained through the preservation of Hudoq rituals, customary structures, and harmonious relations with immigrant tribes. These findings confirm that Dayak Bahau migration is not just a physical displacement, but also a sustainable process of socio-cultural and economic adaptation, reflecting the resilience and flexibility of indigenous communities in the face of environmental change and modernization. This study contributes to the historiographic literature on migration and cultural sustainability in East Kalimantan.]]>
