I think you'll find a few "large" runners in that group! I was thinking about doing that as a one-way - it looks like a great run (once you're up Arthurs Seat).
Runners are treated to a range of surfaces and settings: single track, coastal trail, grassy trail, dirt road and forest canopy.
and if it's rained recently.. your runners might also get treated to abit of mud..
its no wonder that bike of yours creaks and groans so much when you're riding it ;)