In reply to Al Doig:
Over the years I've met a fair number of people who have missed a turning and are a bit stumped....If you know the route perhaps a map is superfluous, but some places (especially the top of Ingleborough) can be very disorientating in cloud.
There is a new track from Penyghent which makes things much easier.
Also, don't forget the Race follows a slightly different route from the 'normal' route (access is granted to some land etc).