Belden Hill Brook is a tributary of the Silvermine River.  It originates in Wilton, south of Comstock Knoll, near Cheese Spring Road.  It flows south between Drum Hill Road and Huckleberry Hills Brook, through South Norwalk Reservoir and Old South Norwalk Reservoir, to the west of Belden Hill and Old Belden Hill, entering the SIlvermine River in Norwalk just west of Mail Coach Drive.