The Water of Leith is a canal-side path that goes about 12 miles between Leith and Balerno. Leith is on the water, about 2 miles north of Edinburgh. It is a very pleasant path for a run. Combination of paved and gravel, and fairly easy to follow. The walkway passes through many areas of interest including: Colinton Village and Dell, the Union Canal, Saughton Winter Gardens, Murrayfield Stadium, the Scottish Gallery of Modern Art, Dean Village, Stockbridge, the Royal Botanic Garden and Leith. The closest pass to central Edinburgh is Royal Botanic Garden, about 2km west of the city center. The southwestern end of the path, in Balerno, is just west of Pentland Hills Regional Park. There’s a visitor center in Saughton. See table for key disrances.
Note: Consult website – there are periodic trail closures and public works.