Waulkmill Wood is a narrow strip of broadleaved woodland just off the Gritstone Trail at the junction of several paths. For more details see the Woodland Trust's web page: Waulkmill Wood.
There's no parking nearby, so I'd recommend using the listed parking spot on Windmill Lane then walking in around the end of Kerridge Ridge, down into the valley then past the waterfall and up through the wood. You may also want to take a detour up to visit White Nancy and enjoy the panoramic views.
The cache is hidden on flat ground near the footpath at the top of the wood. So no need to venture onto the steep slippery slopes further down!
Many thanks to the Woodland Trust for giving permission to place this cache.