River Parrett is in Severn Estuary.
The River Parrett rises in the hills around Chedington, Dorset [Map] after which it flows broadly north past Kingsbury Episcopi, Somerset [Map], Muchelney, Somerset [Map], through Langport, Somerset [Map], Stathe, Somerset [Map], Burrow Bridge, Somerset [Map], then under Somerset Bridge [Map], through Bridgwater, Somerset [Map], past Dunball, Somerset [Map] and Combwich, Somerset [Map] before joining the Severn Estuary two kilometres south of Burnham-on-Sea, Somerset [Map].
Anglo-Saxon Chronicle. 658. This year Kenwal fought with the Welsh at Pen, and pursued them to the Parret. This battle was fought after his return from East-Anglia, where he was three years in exile. Penda had driven him thither and deprived him of his kingdom, because he had discarded his sister.
The River Tone rises at around Clatworthy Reservoir [Map] from where it flows through Clatworthy, Somerset [Map], past Huish Campflower, Somerset [Map], Waterow, Somerset [Map], Stawley, Somerset [Map], Kittersford, Somerset [Map], Thorne St Margaret, Somerset [Map], Tonedale, Somerset [Map], East Nynehead, Somerset [Map], Bradford-on-Tone, Somerset [Map], Barr, Somerset [Map], through the centre of Taunton, Somerset [Map] to which it gives its name.
From Taunton the River Tone flows past Creech St Michael, Somerset [Map], Mare Green, Somerset [Map], Athelney, Somerset [Map] to Burrow Bridge, Somerset [Map] where it joins the River Parrett.
The River Yeo rises near Henstridge Bowden, Somerset [Map] then flows south-west past through Sherborne Lake [Map], past Sherborne Castle [Map] and Sherborne, Dorset [Map], Sherborne Railway Station [Map], Thornford, Dorset [Map], Bradford Abbas, Dorset [Map], where it is joined by the Wriggle River, Clifton Maybank, Dorset [Map], past the east of Yeovil, Somerset [Map], then Mudford, Somerset [Map], Limington, Somerset [Map], Ilchester, Somerset [Map], Long Load, Somerset [Map] before joining the River Parrett 1km south-east of Langport, Somerset [Map].
The Wriggle River rises at Batcombe, Dorset [Map] from where it flows past Harris Farm, Batcombe [Map], Chetnole, Dorset [Map], Yetminster, Dorset [Map] before joining the River Yeo at Bradford Abbas, Dorset [Map].