Koto XI Tarusan District, located in Pesisir Selatan Regency, West Sumatra, features a hilly topography with steep slopes, making it susceptible to landslides. The national road connecting Padang City to Painan frequently experiences landslide incidents that disrupt vehicle traffic. These landslides damage road infrastructure and threaten nearby residents, affecting transportation, economic activities, and public safety. This study aims to analyze the slope stability along the Koto XI Tarusan road in Pesisir Selatan Regency and propose improvement solutions to overcome the disaster. Field observations and data collection were carried out to identify slope conditions. The soil samples taken were disturbed and undisturbed soil samples, then tested for physical and mechanical properties of the soil. A manual slope stability analysis is conducted, followed by slope reinforcement measures, and the safety factors for overturning, sliding, and soil-bearing stability are assessed. The study results show that part of the road in XI Koto Tarusan District has a high risk of landslides. Key factors contributing to landslides include steep slopes, soil predominantly composed of clay easily saturated with water, and high rainfall that triggers erosion and decreases slope stability. Additionally, human activities such as land clearing, inadequate road drainage, heavy traffic, and deforestation further trigger landslides. To reduce the risk of future landslides, implementing mitigation techniques such as erecting retaining walls for slope reinforcement, constructing effective drainage systems, and adopting sustainable land management practices is recommended.