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North Wales

Conwy Castle – Sychnant Pass (Bwlch Sychnant) loop from Llandudno Junction

Routes

Hiking trails & Routes

United Kingdom

Wales

North Wales

Conwy Castle – Sychnant Pass (Bwlch Sychnant) loop from Llandudno Junction

Hard

4.8

(4)

hikers

Conwy Castle – Sychnant Pass (Bwlch Sychnant) loop from Llandudno Junction

05:10

17.5km

490m

Hiking

Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: April 30, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Parc Cenedlaethol Eryri

Waypoints

Start point

Train Station

Get Directions

1.43 km

Conwy Castle

Highlight • Historical Site

Towering above Conwy, Conwy Castle defended the town from sieges and battles, sheltering various monarchs during wars. The castle was built between 1283 and 1289 by Edward I after his conquest of Wales.

The castle is a designated UNESCO World Heritage Site considered one of the finest examples of military architecture in Europe.

The castle is open from 9.30am until 5pm (sometimes until 6pm during high season). Adult tickets cost £12.70.

Tip by

5.47 km

Coed Iolyn

Forest

10.2 km

Sychnant Pass (Bwlch Sychnant)

Highlight • Mountain Pass

While the hills above Bwlch Sychnant are not high by Eryri's standards, their steepness lends the pass a drama all of its own. This is the most northerly mountain pass in the national park, connecting Conwy to Penmaenmawr. A clutch of summits can be ascended from the road, including Alltwen, Penmaen-bach and Mynydd y Dref (Conwy Mountain). Each provide excellent views towards Great Orme and south towards the high Carneddau.

Tip by

11.6 km

Caer Seion Hillfort

Highlight • Historical Site

Caer Seion is a large and strong hill fort. Excavations were carried out in 1951 but did not produce any dating evidence. However, it is believed to have been occupied during the Middle to Late Iron Age, about 300 BC to 1st century AD and it seemed likely that the fort was abandoned when the Romans conquered North Wales in 78 AD. The fort had a commanding position overlooking Conwy Bay and estuary and over the ancient trackway that followed the coastal ridge, continuing westwards towards Anglesey. The next nearest strong forts and possibly tribal centres are at Pen-y-dinas on the Great Orme, Pen-y-gaer above Llanbedrycennin and Braich y Dinas above Penmaenmawr.
The fort had two periods of defence. In the first period a single stone wall of 3 to 4m width encircled the whole hill top apart from at the steep north side where no defence was needed. It had one entrance, at the south side, which would have had a timber gate. The greater width of the wall around the gate suggests it had a ‘fighting tower’ over it. Within the fort were over 50 timber round houses, many just behind the rampart at the south side (to shelter from the wind) and they are visible as circular platforms terraced into the hill slope. They varied in size from about 4m to 8m diameter and traces of walling survive at some of them. In one place there is a possible corn-drying kiln.

Tip by

11.9 km

Caer Seion Hillfort (Conwy Mountain)

Highlight • Historical Site

Very doable mountain top with a nice view over the sea.

Tip by

11.9 km

View of Deganwy and Y Gogarth from the summit of Caer Seion

Highlight • Viewpoint

The view over the region is wonderful.

Translated by Google •

Tip by

12.7 km

View of Conwy Valley

Highlight • Viewpoint

steep climb to here

Tip by

15.4 km

The Smallest House in Great Britain

Highlight • Historical Site

The Smallest House in Great Britain (Welsh: Y Tŷ Lleiaf ym Mhrydain Fawr), also known as the Quay House, is a tourist attraction on the quay in Conwy, Wales. It is reputed to be smallest house in the United Kingdom

Tip by

15.7 km

Statue of Llewelyn the Great

Highlight • Historical Site

Conwy has many fine landmarks and the statue of Llewelyn the Great ranks upon them. The bronze statue depicts Llewelyn in full armour with his sword and shield. It's the official end point of the Snowdonia Way, a long-distance trail that begins in Machynlleth and journeys north through the national park.

Tip by

17.5 km

End point

Train Station

Way Types & Surfaces

Way Types

8.12 km

3.45 km

2.94 km

2.03 km

751 m

267 m

Surfaces

5.51 km

5.09 km

3.31 km

3.04 km

603 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (280 m)

Lowest point (undefined)

Weather

Monday 6 July

23°C

14°C

0 %

Additional weather tips

Max wind speed: 18.0 km/h

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Conwy Castle – Sychnant Pass (Bwlch Sychnant) loop from Llandudno Junction

Conwy Castle

Sychnant Pass (Bwlch Sychnant)

Caer Seion Hillfort

Caer Seion Hillfort (Conwy Mountain)

View of Deganwy and Y Gogarth from the summit of Caer Seion

View of Conwy Valley

The Smallest House in Great Britain

Statue of Llewelyn the Great

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