Aeons of time in pathmaking. Canovium - Segontium: 41.3 km, 25.8 ml; Canovium - Aber: 15.7 km, 9.8 ml; Aber - Rachub - Rhiwlas: 12.3 km, 7.7 ml; Rhiwlas - Penisa'r Waun - Llanrug - Segontium: 13.3 km, 8.3 ml. Segontium - Tomen-y-mur: 45.8 km, 28.6 ml; Segontium - Rhyd-ddu: 16 km, 10 ml; Rhyd-ddu - Beddgelert: 10.3 km, 6.4 ml; Beddgelert - Nantmor - Croesor - Maentwrog - Gellilydan - Tomen-y-mur: 19.5 km, 12.2 ml. Tomen-y-mur - Caer Llugwy: 23.1 km, 14.5 ml; Tomen-y-mur - Dolwyddelan: 16.3 km, 10.2 ml; Dolwyddelan - Caer Llugwy: 6.8 km, 4.25 ml. Caer Llugwy - Canovium: 21.3 km, 13.3 ml. Llanbedr-y-cennin - Tal-y-bont, Llandegai: 21 km, 13.2 ml. Tal-y-bont/Dolgarrog - Capel Curig: 15 km, 9.4 ml. Capel Curig - Bethesda: 18.5 km, 11.5 ml; Capel Curig - Pont Pen-y-benglog: 9.2 km, 5.75 ml; Llyn Idwal; Ogwen - Bethesda: 9.2 km, 5.75 ml. Llyn Ogwen - Dolwyddelan: 20 km, 12.5 ml; Llyn Ogwen - Pen-y-gwryd: 7 km, 4.4 ml; Pen-y-gwryd - Dolwyddelan: 13 km, 8.1 ml. Dolwyddelan - Pen-y-Pass: 15.8 km, 9.9 ml. Capel Curig - Ysbyty Ifan: 22 km, 13.8 ml; Capel Curig - Dolwyddelan: 8.1 km, 5.1 ml; Dolwyddelan - Penmachno: 7.3 km, 4.6 ml; Penmachno - Ysbyty Ifan: 6.5 km, 4.1 ml.
