You may remember a toy from the 70's and 80's that consisted of a maze and a small dollop of mercury (or quicksilver, as it was often known). The idea was to tilt the maze back and forth, side to side until the mercury had flowed from the starting point through to the end. Quite a challenging puzzle.
Well, this puzzle is also quite challenging. You need to follow the path from start to end gathering numbers that will lead you to the cache.
You may find it easier to click on the maze and save it before printing it as an A4 page.
You do not need to climb over or through any fences. A suitable access track is only a short distance further along.