3 miles from the off, Corris Hill @ 25% in parts and lasts for a touch under a mile, head up tal y llyn pass @ 12% for 1 Mile and then decend down to dolgellau and heading up towards rhydymain where another long climb @ 13%average for 2.5miles to top. Decend back down to dolgellau before heading up 6 miles of gradual climbing to the foot of cader idris, stunning views! Road can be busy in summer. Then head back around the coast with a stiff headwind untill aberdovey... flat all the way home then.by HuwDavies