The River Lea is one of the longest, and most important tributaries of the Thames  – taking a 42 mile journey from Bedfordshire to join the Thames at Bow Creek in East London. The Lea has formed the boundary between Saxon’s and Danes, been home to medieval mills, London’s furniture industry and flows through the Olympic Park. This series of walks will look at the history of the River Lea, tracing its course on its way to the Thames.

Starting the journey at Harpenden Station this walk follows the River Lea to the pretty town of Wheatampstead , which has lots of interesting buildings , including an old mill, church and the platform of the now closed railway line. From there we will walk to Devils Dyke, the remains of a huge fortress that was home to the Catuvellauni people, traditionally the place where Julius Caeser fought a huge battle in 54BC

The walk is about 5 miles in total and finishes in Wheathampstead where a bus will take you to either Harpenden or St Albans stations

Harpenden is about 25 minutes from Central London by Thameslink train.