Ed! That was beyond the call of duty. It was horrible up there today!
Anyway, thanks for the input and route suggestion.
The course has defined checkpoints after Capel Y Ffin.
Grwyne Valley Road 248 291
Pen Y Gadair Fawr
Waun Fach
North end Grwyne resevoir 225 312
Twyn Talycefn 223 323
Rhos Dirion