ABSTRACT:This study evaluates, the mass movement that occurred after heavy rains on January 8, 2020 in the Kargıcak district between Km 31+300 and 31+500 of the D-715 highway connecting Silifke and Mut districts. For this purpose, a 2 cm resolution digital surface model and an engineering geological map were first made, using photogrammetric methods from the photographs taken by the unmanned aerial vehicle (UAV). The index and geomechanical parameters of the units were determined by taking disturbed and undisturbed samples obtained from nine boreholes in the area where the landslide occurred. The depth of the sliding surface and velocity of movement were determined using the data acquired from the inclinometers placed on the boreholes. The heavy rains that occurred in the region before January 8, 2020 increased the pore water pressure in the weathered claystone-clay unit outcropping in the landslide area, which in turn caused a decrease in the shear strength of the unit. The Kargicak Landslide started rotationally and developed planarly on the claystone-marl surface with the weathered claystone-clay unit.