Ynys Llanddwyn · Ynys Llanddwyn

Saint, Sand and Sea Trail

Ffeithiau'r daith · Walk facts

Pellter · Distance

4.4 miles / 7 km

Amser · Time

3 hours

Anhawster · Difficulty

Moderate

Math o daith · Route type

Waymarked trail

Man cychwyn · Start

Beach car park (Llanddwyn Beach)

Cyfeirnod grid · Grid ref

SH 405 634

Cod post · Postcode

LL61 6SG

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Dim yn y ffynhonnell · Not given by the source

Parcio · Parking

Charges apply 6am to 11:59pm every day: up to 30 minutes free, up to 2 hours £5, then £0.70 for every 20 minutes more, all day £15. Contactless or RingGo; no overnight parking (NRW, checked 1 Nov 2026).

Cyfleusterau · Facilities

Toilets in Beach car park, including accessible toilets: 8am–6pm in summer (BST), 8.30am–4pm in winter (GMT). Ice cream and catering vans at weekends April–September and daily in the school summer holidays (NRW).

Cŵn · Dogs

On Ynys Llanddwyn from 1 April to 1 September, keep dogs on short leads and stay on marked paths. No dogs on the Blue Flag beach from 1 May to 30 September (NRW).

Tir · Terrain

Dim yn y ffynhonnell · Not given by the source

Hygyrchedd · Accessibility

Dim yn y ffynhonnell · Not given by the source

NRW: this postcode covers a wide area and will not take you directly to the entrance.

Gwiriwyd ddiwethaf · Last checked: 2026-11-01

Chwedl Mythôn · Mythôn legend

In Mythôn legend, Ungorn was the first of the five to step out of the mist, on Llanddwyn, the island of Santes Dwynwen, the Welsh saint of lovers. When the long dark fell, Ungorn's horn kept a thread of light burning by the old Tŵr Mawr lighthouse until the others woke.

Beth i chwilio amdano · What to look for

• The ruins of St Dwynwen's Church
• The holy well, whose eels were said to foretell your love life (Wales Coast Path)
• The legend of Santes Dwynwen and the island's unusual rocks (NRW)

Diogelwch · Safety

Ynys Llanddwyn can be cut off at high tide. Check tide times before you start (NRW). The island can be very exposed: be prepared for bad weather.

• There is no lifeguard on the beach.
• Don't touch any military debris: call 999.
• Don't dig holes or tunnels in the dunes.
• Don't go out onto the estuary: soft mud and the incoming tide can cut you off.

Dilynwch arwyddion a chyngor y ffynhonnell swyddogol bob amser · Always follow the signs and the official source's advice.