This is the bonus cache for my May Hill Adventure Lab.
It is a mostly circular walk of approximately 2 miles which takes you up to the top of the hill. It should take you about an hour.
As you visit each of the 5 points of the Adventure Lab, you will be given a number. To find this cache, put those numbers into this formula:
N 51° 53.(A+E)(B-E)(D-C) W 002° 26.(C-E)(D+A)(B-D-A)
Once you have found the cache, continue to follow the fence round to the right to a gate which will take you back out onto the hill.
It is possible to park at the published co-ordinates, but there are only a couple of spaces. There are lots of other places to park, such as May Hill Village Hall which I have waypointed.