From number 5 rejoin the main forest traks and take the right hand fire road. Once close to GZ, go slightly past (10m) where the GPS is showing you for easier access into the trees.
Remember to take note of the information on the cache lid to help solve the mystery.
Full details of the trail can be found on the listing for the Bonus cache. It is a walk of approximately 4 miles mostly on forest tracks and paths but most of the caches are hidden a few metres off the trails and will potentially require negotiation some steep or rough ground. Please take note of the attributes and terrain rating of individual caches.
The cache is placed in woodland managed by Natural Resources Wales (formerly Forestry Commission Wales) with their permission. See the agreement in the UK Geocaching Policies Wiki.