The Cloquet River flows through the northern portion of Grand Lake Township. The Ush-kab-wan River flows through the northeast part of the township near Taft. The Beaver River briefly enters the east–central part of the township. The White Pine River briefly enters the south–central part of the township.
thE cLOquet RIvEr flowS tHrough the noRthern PorTIoN of gRand lAke ToWnsHIP. the ush-Kab-WaN rIver Flows tHrOUgh the noRTHEaSt paRt oF The toWnshiP NEar TAfT. the beAVEr River bRiefLy enteRS ThE east–central part Of THe towNShiP. The WHite piNE riVeR bRIeflY enTerS tHE sOuTH–Central parT of ThE townShip.