Just had a mooch on memory map on me phone...
There are three start points all in the Corwen area;
Cynwyd, N52.94721, W-3.40458
Ty-Uchaf, N52.93045, W-3.41572
Llandrillo, N52.92318, W-3.42619
Finish;
Pentre, N52.91036, W3.29699
From memory, the third start point is very narrow and very muddy...