You can download an audio guide in MP3 format from the full website, which will tell you what to look out for all the way along the line. It's available in sections between stations: best to download just those that you need, the whole guide is huge.

There's also an audio guide to the Ribblehead site which takes you on a 45 minute tour of the area and really brings it all to life. At the same time you can download a pdf map from the full web site to enable you to follow the trail.