Start/Finish Start/Finish Miles
Brighouse  Marsden 13.5
Mirfield Horbury Bridge 7.4
Mirfield Brighouse 5.3
Brighouse  Horbury Bridge 12.75
Horbury Bridge Marsden 23.0
Marsden  Aspley, Huddersfield 7.75 
Aspley, Huddersfield Mirfield  7.75 
 
There are so many combinations of walking distances that it would not be practical to provide a full table here.
However, you should be able to derive a reasonably accurate total distance for your chosen walk by adding sections from the above table.
If you are registering online then the full choice of Start and Finish points, with the more accurate distances, is offered during registration.