View of Caernarfon Castle – Afon Seiont loop from Caernarfon

Routes

Running trails & routes

View of Caernarfon Castle – Afon Seiont loop from Caernarfon

Moderate

runners

View of Caernarfon Castle – Afon Seiont loop from Caernarfon

01:03

10.0km

90m

Running

Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: August 21, 2026

Tips

Temporary access restrictions

Includes segments with temporary access restrictions.

After 2.40 km for 75 m

Closed: • 11:00 PM-7:00 AM (otherwise open)

Waypoints

Start point

Bus stop

Get Directions

1.98 km

St Mary's Church, Caernarfon

Highlight • Religious Site

Beautiful little church integrated into the city wall.

Translated by Google •

Tip by

2.52 km

View of Caernarfon Castle

Highlight • Historical Site

Castell Caernarfon is recognised around the world as one of the greatest buildings of the Middle Ages.

This fortress-palace on the banks of the River Seiont is grouped with Edward …

Tip by

2.86 km

Caernarfon Tower

Highlight • Monument

5.40 km

Segontium Roman Fort

Highlight • Historical Site

Built by the Romans in AD 77 on the outskirts of Caernarfon, the Segontium Roman Fort was once the most important military base in North Wales. The Segontium was built …

Tip by

7.09 km

Caernarfon Cycle Path Entrance

Highlight • Rest Area

7.55 km

Afon Seiont

Highlight • Other

8.13 km

Caernarfon Harbour

Highlight • Structure

Lovely little harbour with lots of boats. You can walk along the sea front and there are bars, pubs and restaurants nearby and around the harbour to visit.

Tip by

8.34 km

Victoria Dock Marina, Caernarfon

Highlight • Structure

Caernarfon's Victoria Dock was built in the 1800s to receive timber sailed over from Scandinavia. It wasn't busy for long though, as the arrival of the railway somewhat undermined its …

Tip by