Elidir Fawr from Nant Peris
Key: Mountain over 914m Peak over 600m Peak under 600m
Length: 11km Height gain: 1130m Highest point: 947m Approx time: 5 hours gpx file
A route which can be done in ether direction. It covers some of the same ground as Y Garn from Ogwen, hence I will cover it in the reverse direction. This does however have the disadvantage of a slog up Elidir Fawr to begin with. You may want to reverse the route so that you descent this way (the GPX file does cover it in reverse as this is my preferred direction). The ground is straight forward and can be covered in snow relatively safely (just take care along the ridge). There are good views along from Elidir Fawr, both to the Snowdon Range and also down to Marchlyn Mawr the upper lake in the "Electric Mountain" scheme.
Begin from the small village of Nant Peris which is just past Llyn Peris (the lower lake in the First Hydro scheme). Follow a side road up to the left just past the Church which is signed to camping. Take this road to its end, and from here take the signed public footpath over fields. You will come to a style over a wall which you should cross. The path continues up by the side of a river. Carry on until there is a bridge over the river. Cross it and then head up through gaps in the walls to the summit of Elidir Fawr. This is a bit of a slog, but at the summit you will find a shelter which is ideal for lunch. There are views of the Snowdon range back the way you have come, and you can look round to the East and see the rest of your walk for the day.
Head off to the East following the cliffs to your left. Look down to see Marchlyn Mawr. You will soon find yourself joining the well defined path described in Y Garn from Ogwen. The next section of the walk is simply a reversal of the traverse from Y Garn to Foel Goch. Once again it is optional as to whether you include Foel Goch. When you eventually reach Llyn y Cwn you will not head down the Devils Kitchen. Instead follow a poorly defined track though the grass (it is likely to be boggy) which heads off to the West by the lake. You will come to a fence which you can follow down for a significant distance by the Afon Las. Leave it when it turns off to the right, and continue to pick your way down just above the river. The path should be fairly clear and will eventually bring you out on the main road from where you can turn right and walk back to Nant Peris.
As a final suggestion for the walk it may be worth calling in the Vaynol Arms.