The Mohana River site is comprised of loose, unconsolidated sediment deposited by fluvial processes, rendering it highly susceptible to liquefaction, posing a potential disaster in the future. Therefore, employing techniques like stone columns to mitigate excess pore pressure becomes imperative. This study focuses on assessing the distribution of excess pore water pressure (EPWP) during earthquakes in soil, both with and without stone columns. Using PLAXIS 2D software and the UBC3D-PLM constitutive soil model, liquefaction phenomena are analyzed through finite element modeling (FEM). Borehole data from the Mohana River site located in Kailali district is used to analyze the liquefaction phenomenon. Stone columns reduced excess pore water pressure (EPWP) by 82.86%, from an average of 77.6 to 13.3 kN/m2, which lowers the excess pore water pressure ratio (EPWR) and thereby reduces the soil's susceptibility to liquefaction. Finally, the efficacy of stone columns as a potential mitigation measure for liquefaction is assessed across different soil conditions, providing crucial implementation recommendations for engineers and developers involved in infrastructure development.