The New River Path is a long-distance footpath which follows the course of the 17th-century aqueduct, the New River, for from its source in Hertfordshire to its original end in Islington, London. The path is waymarked and all signs display the words "New River Path" on a green background. History The New River itself was completed in 1613. The aqueduct supplies water from Hertfordshire to North London. The New River Path was developed over a 12-year period at a cost of over £2 million; of this sum £1.3 million has been invested by Thames Water in the project. Throughout this time Thames Water has worked to overcome operational, safety and security issues in partnership with, and with the support of, many organisations; including Groundwork, London's Waterway Partnership, the Countryside Agency, the New River Action Group, Friends of the New River Walk, local schools, and all the local authorities along the route. In 2021 the New River Path was blocked close to its northern end, when its crossing over the Hertford East branch line at Kings Mead was closed by Network Rail on safety grounds. Route The grassed riverside path is restricted to use by walkers, with a few sections with hard surfaces being accessible to wheelchair users. At all path access points, safety notices are displayed which specify precautions. Users of the route are requested (by Thames Water) to keep to the path, not to interfere with wildlife, keep dogs on leads and avoid fouling, take litter home and take care crossing roads. At times, operational work needs to be carried out which may cause sections of the path to be closed temporarily. The walk can be split into the following three sections. Hertfordshire; The path begins at New Gauge, Hertford, and passes through the Lee Valley towns and villages of Ware, Great Amwell, St Margarets, Rye House, Hoddesdon, Broxbourne, Turnford, Cheshunt and Waltham Cross. London; After crossing over the M25, the path passes through four London boroughs; Enfield, Haringey, Hackney and Islington. The route of the path takes it close to the Hertford Loop Line stations of Enfield Chase, Winchmore Hill, Palmers Green, Bowes Park, Alexandra Palace, Hornsey, Harringay and Essex Road. The route is also adjacent to Harringay Green Lanes railway station, Manor House tube station, Canonbury railway station and Angel tube station. From Clissold Park, its route along the broad verge down the centre of Petherton Road