The cache has taken up the theme by changing the digits of the final coordinates to an item that can be obtained by examining a list. In this case it can be a little tricky as different web sites have varying information. If you use Wikipedia take care to read the text preceding the lists as one is old and no longer considered accurate. Another web site excludes peaks that are on the same massif.
In the hints there is a link for the list if you need it.
Unfortunately the bends in Montrose Trail have made the walk, from No 9, double the distance that would have been the case if it had been straight; never mind.
The cache is located at
S (Pelion Legges) ° (Barn Stacks). (Cradle Stacks Ossa)
E (Ossa Pelion Markham) ° (Ossa Giblin ). (Cradle Barn Barn)
10 = Zero