The walk starts in Water Lane which is off Northorpe Lane in Thurlby. Walk up Water Lane and turn right along the track.(You are crossing over the disused Essendine and Sleaford railway line, although it's not particularly evident here you can walk along stretches of this line if you follow Wood Lane towards Bourne)
Follow this track until you come into an open field. Continue walking in the same direction, towards a line of trees, and cross over a small plank bridge and then over a second plank bridge. When you reach a track turn left.