Whilst Karen was putting the children back in the car I took the opportunity to have a quick look at this cairn. Access to the field is over a metal field gate.
The site is completely neglected and overgrown. The stones are small and well hidden by the long grass, brambles, bushes etc.
Unless/until this site has been cleared I couldn’t recommend a visit.
A brief gander at the OS map reveals this second site directly across the road from Mains of Clava NW, hidden (at least during summer) by overgrown bushes and dense grass. Be careful crossing the rickety drystane dyke (wall), unless you're an expert at rebuilding them.
These 'hidden' stones are somewhat special because you are almost guaranteed to be the only visitor that day.