This study investigated the relationship between soil texture and soil erodibility in the sloping lands of the Kelarud watershed, Babol, Mazandaran Province, Iran. A total of 17 soil samples were collected from different depths and topographic positions. Selected soil properties, including sand, silt, clay, organic carbon, electrical conductivity (EC), and pH, were measured. The soil erodibility factor (K) was estimated using the Revised Universal Soil Loss Equation (RUSLE) nomograph. The results revealed considerable variation in soil texture, ranging from sandy loam to clay textures. A significant positive relationship was observed between silt content and the K factor, whereas clay and organic matter contents were negatively associated with soil erodibility. Soil erodibility increased with increasing silt content, and soils containing more than 50% silt exhibited the highest K values (0.26-0.52). In contrast, soils with higher clay content (>40%) and greater organic matter showed lower K values (0.24-0.30), which may be due to enhanced aggregate stability and structural resistance. Furthermore, steep slopes (>15%) combined with reduced organic matter increased the susceptibility of surface soils to erosion processes. Spatial analysis indicated that sub-watersheds characterized by high silt content and poor soil structure were the most erosion-prone areas. The mean soil erodibility factor for the watershed was estimated at 0.37, indicating moderate to high sensitivity to erosion. Overall, the findings highlight the important role of soil texture and particle-size distribution in controlling soil erodibility. Therefore, increasing soil organic matter, maintaining vegetation cover, and implementing conservation practices such as terracing are recommended to improve soil stability and reduce erosion risk in the Kelarud watershed.