Maximum discharge along the river was observed at the Thompson River Near Thompson Falls Mt with a streamflow rate of 178 cfs. However, the deepest point on the river is located at the Thompson River At Trenton reporting a gauge stage of 9.71 ft. This river is monitored from 3 different streamgauging stations along the Thompson River, the highest being perched at an elevation of 2,440 ft, the Thompson River Near Thompson Falls Mt.