Take the Chesham Road from Wigginton and park just past the left-hand turn to Wigginton Bottom (or turn and park there). To reach Grim’s Ditch, take a footpath to the right a short distance from the Wigginton Bottom turn and before the left hand turn into Crawley’s Lane. Use the stile at the roadside and follow the footpath straight across the field to a second stile. Get over, and follow the path as it bears to the right round the edge of the field. After a short distance the path turns sharp left, at a low grassy bank - Grim’s Ditch. The footpath and Grim’s Ditch run straight down the gradual slope for about a mile, to Longcroft Farm. Grid reference SP 9385 0938 to SP 9176 0870.
Map showing Grim's DitchTips and advice on using hertsdirect.