The Kilburn – Horsley Woodhouse Circuit (KHWC) is a circular walk of around 4.75 miles, mixing an assortment of caches including nano, micro, small, regular, multi and even a letterbox hybrid cache.
There are 21 caches in total, including the bonus for which you will need to collect clues from each of the other caches to be able to work out the final coordinates. Please be aware that some of this circuit can be VERY muddy.