GPS Cycle and Walking Routes

Lon Eifion

11 miles (18 km)

This splendid cycling and walking trail runs along a disused railway path from Caernarfon to Bryncir on the edge of the Snowdonia National Park. It's a good surfaced traffic free path making it ideal for a safe family cycle or a leisurely walk. There are lovely views of the surrounding Welsh Countryside and mountains such as Yr Eifl (or the Rivals) and Snowdon. The route runs alongside the Welsh Highland Railway so you should also see some wonderful steam trains as you go.
The route starts at Caernarfon at the impressive Caernarfon Castle, and heads south through the town, crossing the River Seiont on the way. You continue to Llanwnda and Groeslon where you pass the lovely Glynllifon Country Park. It's well worth taking a short detour from the path and visiting the park with its woodland, gardens, parkland and river. There is also a cafe, a maze and exhibits such as steam power pistons restored by Fred Dibnah.
The route continues through Penygroes before the final stretch takes you to the finish point at the little village of Bryncir.

Lon Eifion OS Map - Mobile GPS OS Map with Location tracking

Lon Eifion Open Street Map - Mobile GPS Map with Location tracking

Cycle Routes and Walking Routes Nearby


Lon Eifion - - 1248628

Lon Eifion running alongside the Welsh Highland Railway track

Lôn Eifion Bryncir - - 603142

Lôn Eifion Bryncir. This is the end of Lôn Eifion which runs along the trackbed of the former railway which ran from Caernarfon to Afonwen junction. At the site of Bryncir station Sustrans route 8 - Lôn Las Cymru - leaves the route of the railway and heads down country lanes to Criccieth.

Old railway bridge now carrying the Lon Eifion cycleway - - 886222

Old railway bridge now carrying the Lon Eifion cycleway. This bridge carried the Afonwen to Caernarfon railway. The line was closed in the 1960s but has now been tarred to provide an excellent walking/cycling route.

View north along the former trackbed of the Caernarfon-Afon Wen Railway Line - - 352064

View north along the former trackbed of the Caernarfon-Afon Wen Railway Line. The trackbed of this branch line which, until the 1960s, linked the main North Wales line with the Cambrian Coast line, now forms the cycleway known as Lon Eifion.

Plas Dinas Bridge - - 225167

 Plas Dinas Bridge. The bridge crossing the WHR track and Lon Eifion Cycle Route carries the private drive that leads to Plas Dinas, the boyhood home of Antony Armstrong-Jones - Lord Snowdon.


GPS Files

GPX File

Lon Eifion.gpx (On Desktop:Right Click>'Save As. On Ipad/Iphone:Click and hold>Share>Save to Files')

Memory Map Route

Lon Eifion.mmo (On Desktop:Right Click>'Save As. On Ipad/Iphone:Click and hold >Share>Save to Files)