Loch Leven Heritage Trail (United Kingdom)
The Loch Leven Heritage Trail is a circular route around Loch Leven in Fife, Scotland. It is just shy of 20 km long, and you can run it clockwise or anti-clockwise. It is level and barrier-free for most of its length. There are numerous access points, with plenty of parking (and cafes - with toilets) making it super-accessible to walkers, runners and cyclists, but I started and finished at The Boathouse car park in Kinross, running anti-clockwise.