Well this one beat me. Haven't climbed Clachnaben for about 30 years and fancied a change from the usual Bennachie season starter. Due to much faffing about on my part & from having pick up the good lady from her work this was a time constrained effort. As far as I could get in 90 minutes. Did reasonably well maybe another half an hour or so would have got me to the top.
My abiding memory is that the walk back to the car park up that last slope seemed to go on for ever.