Gyrn Ddu

About Gyrn Ddu

Gyrn Ddu is a hill near the north-eastern corner of the Llŷn Peninsula, in the community of Llanaelhaearn in Gwynedd, North Wales. It forms the western half of a wider upland area, whose other significant top is the 510-metre summit of Bwlch Mawr to the east.

Gyrn Ddu has several outlying tops of its own: Gyrn Goch, its distinct northern top, reaches 492 metres, while an eastern top of 491 metres is crowned by a prehistoric cairn. To the south-west lies the lower top of Moel Pen-llechog at 316 metres, and to the south the flat 416-metre top of Moel Bronmiod.

Background written from facts in the Wikipedia article on Gyrn Ddu (CC BY-SA 4.0). Heights, prominence and grid references come from the Database of British & Irish Hills, not from Wikipedia.

Access rights here

General position for Wales — local byelaws, seasonal restrictions and closures can override it. Full details: access rights in Wales ·check another location.

Daylight at this summit today

Sunrise

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Sunset

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Daylight

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Civil twilight ends

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Computed astronomically for 52.994, -4.384. Plan your finish with the daylight safety planner.

Finding the summit

The recorded summit point is cairn. On broad or flat summits the obvious cairn is not always the true high point.

Survey method

obvious summit/Trimble GeoXH 6000

Record revised

24-Apr-15

Drop measured from

SH387445 · 136 m

Survey notes are field observations recorded in the Database of British & Irish Hills (v18.3, CC BY 4.0) by the hill-surveying community.

Get food nearby

3 places to eat or drink within 10 km of the summit, rated under the Food Hygiene Rating Scheme (Scotland runs its own Food Hygiene Information Scheme, a pass/fail equivalent).

Classifications and ratings are the local authority's own and can be coarse — this is a lead, not a guarantee of opening hours or that food is served to non-residents. Follow a name through to the official rating page to check, and confirm before you rely on it.

Food hygiene data from the Food Standards Agency and Food Standards Scotland (Open Government Licence v3.0). Distances and directions computed by OpenFell from the summit.

The Gyrn Ddu group

One other listed summit sits in the same prominence group, with Gyrn Ddu as the independent hill at its head.

Grouping is by prominence alone: a summit belongs to the nearest higher Marilyn it connects to without a deeper intervening col. Over a large massif that can gather hills no one would walk in a single day, and which few would describe as parts of the same mountain — it is a measure of independence, not a suggested route.

Nearest listed peaks