From the rest stop, it's a bit of gentle off-roading across the grass and stones, past the circular cairn and onwards to a collection of large erratics.
Nearby is a fallen tree. The thin soil and fractured rocks sometimes mean the trees don't have a really good grip when the wind blows.
The cache is a vial in a small hole in a root. Please be gentle when extracting it and while rooting around.
No.5