River Soar is in River Trent.
The River Soar rises near Wibtoft, Warwickshire [Map] after which it travels broadly north through Leicester, Leicestershire [Map], past Mountsorrel Castle [Map], Normanton on Soar, Nottinghamshire [Map] and Holy Trinity Church Ratcliffe on Soar [Map] before joining the River Trent.
The River Wreake aka Eye rises near Stapleford, Leicestershire [Map] although the land is so low lying there are many tributaries that may form the River Eye and it may rise at Waltham on the Wolds, Leicestershire [Map]. It flows through Melton Mowbray, Leicestershire [Map] after which its name changes from the River Eye to the River Wreake. Thereafter it flows past Asfordby, Leicestershire [Map], Hoby, Leicestershire [Map], Rotherby, Leicestershire [Map], Thrussington, Leicestershire [Map], Ratcliffe on the Wreake, Leicestershire [Map] to Cossington, Leicestershire [Map] where it joins the River Soar.