The Lee Valley Walk is a 53 mile route mainly on riverside paths, linking the source near the Icknield Way Path east of the Dunstable Downs to the London Docklands. It first follows the course of the river, which is variously spelt Lee and Lea, and then after a suburban diversion from the river at Welwyn, it takes the canalised navigations from Hertford, using wherever possible green waterside corridors. It passes the numerous reservoirs that line the Lea valley through North London.
This 35mm film canister type cache is located in a shrub in the hedge at the side of the roadway, about chest height.