Dovestone quarry slog

A lone rambler approaches the boulders and scree fields of Dovestone quarry at Dovestone reservoir in Greenfield, Oldham, Greater Manchester and is about to enter ‘the slog’ on Saddleworth moor.
(It’s an old picture from around nine years ago, so I can see the errors caused by either myself or the cheap lens I used, but the left-hand side of the picture is out-of-focus: could be a de-centred lens element?)
*Shot on a Canon 600d 18mp dSLR using a Sigma 18-125mm f/3.5-5.6 DC lens with settings at ISO-200, aperture at f/6.3, spot metering mode and an exposure time of 1/500 seconds*