The Batang Taluak Ambun Sub-watershed in West Pasaman Regency is characterized by varied topography and high rainfall, making it vulnerable to flash flood hazards. This study aimed to identify and analyze the physical characteristics and to map the flash flood hazard levels in the area. A descriptive quantitative research design was employed, with the study site located in the Batang Taluak Ambun Sub-watershed and the samples consisting of land units determined through purposive sampling in acco