Aberglaslyn Pass

From the National Trust car park at Nantmor, the short out-and-back to Beddgelert is about 5 km in total and usually takes around 1.5 hours at a relaxed sightseeing pace. The route is not a smooth promenade: expect steps, exposed rock, roots, narrow sections, and mud after rain. The path can feel more demanding than the distance suggests, particularly where it runs beside the river.

For a longer day, the National Trust's circular walks add Beddgelert, Bryn Du, Llyn Dinas, or the old copper workings at Cwm Bychan. Those extensions become proper hill walks, with steeper ground and more navigation, so treat the short gorge walk and the larger circuits as different outings.

Use the National Trust car park at Nantmor, postcode LL55 4YG. Sat nav may leave you at Nantmor village rather than the entrance, so follow the signed approach from the A4085 and do not block the narrow road, field entrances, or residential access. A toilet is available in the car park; there are no reliable facilities along the gorge itself.

Dogs are welcome, but keep them under close control around livestock, the railway, other walkers, and the river. Bring grippy footwear, a waterproof layer, drinking water, and a small snack. Keep children close near the water and road crossings, and do not treat the river's clear pools as a safe swimming spot: flow and slippery rocks can change quickly.

The restored Welsh Highland Railway is part of the scenery too. Its track runs through the pass and disappears into old tunnels, giving the walk an unusual mix of river gorge, railway history, and working landscape. Continue toward Beddgelert for a village stop, or make the gorge the main event and turn around when the footing or time stops being fun.