Welcome to the Skipton A-Z series, a 4 mile walk around Skipton Moors and High Bradley consisting of 26 caches, hopefully none of which will cause you too many problems.
From the last cache, carefully cross the stream (usually pretty muddy!) and follow the track down to a gate. To the left is a slightly loose stile in the wall, so just be careful. Once at GZ, you'll need to be at 'pipe' level to look inside another tree.