We start in Llanberis or Nant Peris and after completing the 15 peaks end up near Aber Falls: Yr Wyddfa/Snowdon massif, descend steeply to Nant Peris, ascend to the Glyderau range, then a descent to the Ogwen Valley for the final section - the Carnedds
You can use the interactive controls to zoom in and out and to move around the map, or click on a marker for more info. (interactive map help)