^x Mt. Sorak national park trails are receiving high levels of use that is affecting user satisfaction and resource management. Trampling impacts studies were conduced in 2 courses to measure soil loss, extent of trail width, and vegetation change. Trail erosion were quantified using a cross -sectional area and most Portions were eroded severely in Oe - Sorak course especially. Phytosociological changes were also surveyed on trail - sides and controls by quadrat to confirm that trampling had an effect on the composition of the vegetation. Information from this study could be used directly in the planning, construction of new trails, and the maintenance of existing trails.