Utpalinī (Utpalini) was a river in the Naimiṣāraṇya (Naimisharanya) which was mentioned in the Mahābhārata (Mahabharata). During his Vanavasa (the compulsory stay in the woods), Arjuna came to this pious river.
The scholars think that the Naimiṣāraṇya (Naimisharanya) was situated in Uttarpradeśa (Uttarpradesha). According to this belief, the river Utpalinī (Utpalini) should flow through the state, Uttarpradeśa (Uttarpradesha). But it is tough to recognize the present name of this river.