Watch out for the cows! and its an extremely muddy field you need to cross. You're looking for a cache hidden where the noisy cows can't get at it!
A Series of 17 caches that will take an hour or two to walk and find them all.
There is usually cows in this field, and if you're coming from number 11, you may find some animlas of the equine variety too: usually no issues with any animal life in this area. The entrance and the exit are pretty much oppsoite each other in this field, but you'll not be able to see it from one side to the other due to the lie of the land: don't follow the edge as you'll go the long way round and also its really muddy as the cows seem to like walking around the edges of the field! The cache is not hidden in the field itself; You are looking for a cache near to the exit point of the field.