Assuming that you’re following the 6600 km North Sea route in a clockwise direction, then you would either come ashore at Harwich and make your way to Colchester, or come up from Dover to London and out to Colchester.
Leaving Colchester on Severalls Lane, you work your way North to Langham before going down Gun Hill to cross the river Stour into Suffolk at Dedham. Passing through Higham, you reach Hadleigh, where the Railway Walk out through Raydon Great Wood takes you towards Chattisham and Copdock, before heading through Belstead village into Ipswich. The route leaves Ipswich via the Heath Road hospital grounds and through Bixley and Kesgrave to Martlesham, where the route turns North again through the edge of Woodbridge and on to Bredfield.
The rural Suffolk section passes through Charsfield and Easton on the way to Framlingham. Heading in a North-Easterly direction brings you to Peasenhall before arriving in Halesworth. The next town is Beccles, where the route passes over the Waveney into Norfolk, with Gillingham the first port of call. Geldeston and Ellingham soon follow, with a longer stretch up to Loddon, nearby Chedgrave and then Langley Street. Claxton and Surlingham follow. The route runs alongside Whitlingham Great Broad before arriving in Norwich.
After Norwich, the route heads in a North Westerly direction up to Thorpe Marriott and then Lenwade, followed by Whitwell and Reepham. At Guestwick, the route heads South East for a short distance to Foulsham, before heading East at Bintree. The next points on the route are Great Ryburgh, followed by Hempton, which is on the outskirts of Fakenham, where the route turns North to West and then North Barsham. Little and Great Walsinham then feature, before there is a choice of route at Wighton.
Branching left takes you to the edge of Holkham Park, whereas taking the right fork goes through Wells-next-the-Sea, eventually looping back to the route through the centre of Holkham Park, and on to Burnham Market. You then run parallel to the Norfolk coast until RIngstead, where there is a 90 degree left turn due South the Sedgeford. Continuing in a southerly direction leads to Ingoldisthorpe and Sandringham, before reaching Castle Rising and North followed by South Wootton, and in to Kings Lynn.
Heading towards Cambridgeshire, the route out of Kings Lynn is via Wiggenhall St Germans and on to Wisbech.
Full details of the North Sea route – Eurovelo Route 12 – are available online.