Bwlch Mawr

About Bwlch Mawr

Bwlch Mawr is a hill near the north-eastern corner of the Llŷn Peninsula, in the community of Clynnog in Gwynedd, North Wales. It forms the eastern half of a wider upland area whose highest point is the 522-metre summit of Gyrn Ddu, though it is on Bwlch Mawr that the Ordnance Survey constructed a trig point. Its name is an odd one for a hill, meaning 'big pass' in English.

Background written from facts in the Wikipedia article on Bwlch Mawr (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 53.005, -4.346. Plan your finish with the daylight safety planner.

Finding the summit

The recorded summit point is large boulder 12m ESE of trig point. That distinction matters on broad or flat tops, where the obvious cairn is not always the true high point.

Survey method

Leica NA730/Leica GS15/Trimble GeoXH 6000

Record revised

11-Jul-23

Drop measured from

SH 4143 4664 · 362.7 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.

Which hill this one belongs to

Bwlch Mawr is not counted as an independent hill in its own right. In prominence terms it belongs to Gyrn Ddu (522 m) — the nearest Marilyn you can reach from this summit without first dropping below its key col, 363 m.

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