The Suffolk River Stour rises at West Wicken [Map] in Cambridgeshire from where it flows past Weston Green [Map], Carlton [Map], Great Bradley, Suffolk [Map], Little Bradley, Suffolk [Map], Great Thurlow, Suffolk [Map], Keddington, Suffolk [Map], New England, Suffolk [Map], Stoke by Clare, Suffolk [Map], Clare Priory, Suffolk [Map], Cavendish, Suffolk [Map], Long Melford, Suffolk [Map], Sudbury, Suffolk [Map], Henny Street, Suffolk [Map], Lamarsh, Suffolk [Map], Bures, Suffolk [Map], Wissington, Suffolk [Map], Nayland, Suffolk [Map], Thorington Street, Suffolk [Map], Higham, Suffolk [Map], Stratford St Mary, Suffolk [Map], Dedham, Suffolk [Map], Flatford, Suffolk [Map] to Manningtree [Map] where it widens to form an estuary and is joined by the River Orwell aka Gipping at Harwich [Map] where it joins the North Sea.

The Great Road leaves Colchester along the A12 passing Langham [Map] to Stratford St Mary, Suffolk [Map] where it crosses the Suffolk River Stour and make a change in direction before passing Capel St Mary, Suffolk [Map]. After Capl St Mary the road turns north following a direct parh past Sproughton, Suffolk [Map], Bramford, Suffolk [Map], Great Blakenham, Suffolk [Map] to Combretovium [Map] aka Baylham.