Guidebook to 40 of the best trail and fell runs in the Yorkshire Dales National Park. Ranging from 5 to 24 miles, the graded runs start from bases such as Ribblehead, Dent, Sedbergh, Malham and Grassington and take in the region's diverse delights, from castles and waterfalls to iconic mountains such as Whernside, Ingleborough and Pen Y Ghent.