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Lon Eifion Circular Route – via Pontllyfni and Pont y Cim

By Dave Roberts   

on February 19, 2015    No ratings yet.

Posted as a walk in –

Lon Eifion Circular Route – via Pontllyfni and Pont y Cim

Further Details

Route Summary:

Route Start Location:

17.24 km 175 m

Calculate the time using Naismith’s Rule and factor in your own pace.

Activivity Type: 

Summits and Places on this Route


Check out the businesses nearby for more places to stay and drink.


Remember that we cannot outline every single hazard on a walk – it’s up to you to be safe and competent. Read up on Mountain Safety , Navigation and what equipment you’ll need.

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Recommended Maps


Lon Eifion Circular Route – via Pontllyfni and Pont y Cim Ordnance Survey Map and GPX File Download

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Lon Eifion Circular Route – via Pontllyfni and Pont y Cim

The Lon Eifion Cycle Path may be a respectable 20km in length, but as it’s an out and back there can be a lack of interest. You can easily add some variety on the track by adding a loop along some quiet and picturesque country lanes.

This route concentrates on the section between Llanwnda and Penygroes, but you could start either end of the trail and use this as a return loop. If you want an alternative near Caernarfon, then the Foryd Circuit makes an excellent cycle on quiet roads (though beware some sections at the usual rush hours!)

1 Follow the A499 cycle route from Llanwnda. It starts at the car park there, and passes through the hamlet before joining the traffic free route at the far end. This can be followed easily alongside the A499 for just over 5km, with only a couple of road junctions to negotiate. Ensure you don’t turn up the wrong lane, with the one marked for Penygroes a well known local rat-run, and best avoided.


2 At Pen-y-Groeslon (SH441 536), marked by a ruined cottage, take an easy country lane to the left rather than following the cycle track parallel to the main road (image below).


3 There are a number of junctions on this lane, and you may well need the map to be safe! Ignore the first junction to your left (this beings you out near Penygroes, on a busy ratrun) and continue over Pont y Cim below.

pont cim

4 Continue to another juntion, and turn left towards Tai’n Lon. Continue past the chapel, ignoring the junction and staying on the lane. This pulls uphill for the next kilometre, where you turn left on this quiet lane. If you’re due a breather, then this is one of the higher points and there are good views down to the sea from here.

You could alternatively turn right and continue along the lane until you reach Llecheiddior-Uchaf and join the Lon Eifion at Bryncir.

5 Continue along this lane, which has excellent views in all directions and you’ll reach a tunnel under what used to be the railway in just under 3km. Pass through this and you’ll find the access point to the Lon Eifion beyond.


You can follow our route up to Rhyd Ddu via Nantlle from this point

6 Turn right on the cycle track, and you’ll be back at the start in 6 km. There’s a café at Inigo Jones just before Groeslon, or a pub in the village which is on the path. Note that there isn’t a pub at the route’s start in Llanwnda, nor in Llanllyfni as marked on some maps.

Autumn, reviews 029

Combine it with Lon Eifion Circular Route  – Groeslon Loop for a longer route, or for a figure of 8 route.

Dave Roberts founded Walk Eryri in 2004, with the aim of providing routes that are off the beaten track. Walk Eryri is now part of Mud and Routes which continues to provide more off beat routes and walks in Snowdonia and beyond. Dave has been exploring the hills of Eryri for over thirty years, and is a qualified Mountain Leader. Dave also established Walk up Snowdon, Walk up Scafell Pike and Walk up Ben Nevis just to mention a few.

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