 Somerton is situated on a plateau , above and to the south of the deep valley of the River Cary . The river flows west and then north through the Somerton Moor and then into King 's Sedgemoor Drain on the Somerset Levels eventually joining the River Parrett near Bridgwater . The town is 116 miles ( 187 km ) from London , 28 miles ( 45 km ) south from Bristol and 9 miles ( 14 km ) north @-@ west from Yeovil , just off the Dorset border . Somerton 's hamlets include Etsome , Hurcot , Lower Somerton , Littleton and Midney . Great Breach Wood is a biological Site of Special Scientific Interest ( SSSI ) and is situated just 1 @.@ 4 miles ( 2 @.@ 3 km ) north @-@ east from Somerton , near the hamlet of Littleton . 
