I've run this the past two years and both times its come up just short of 22m for me on the garmin. Could have been shorter (or faster) if I turned back over Chevin from East Quarry car park rather than running through it and back over on the rough track. I was fitter this year but only a minute or two faster, the conditions obviously played their part.

Great event again, hats off to organisers and the poor, cold, volunteers, manning checkpoints.