Pen y Boncyn Trefeilw

About Pen y Boncyn Trefeilw

Pen y Boncyn Trefeilw is a subsidiary summit of Cyrniau Nod in the Hirnantau section of the Berwyn range, north-east Wales. It has two tops of its own, Stac Rhos and Pen y Cerrig Duon, the latter now a deleted Nuttall following re-surveying.

A small cairn marks the summit, only a few metres from a track road running on towards the pass between Cyrniau Nod and Y Groes Fagl. The outlook is broad but the flat moorland gives it little variety.

Background written from facts in the Wikipedia article on Pen y Boncyn Trefeilw (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 52.842, -3.542. Plan your finish with the daylight safety planner.

Finding the summit

The recorded summit point is no feature: tussock. That distinction matters on broad or flat tops, where the obvious cairn is not always the true high point.

Survey method

Leica RX1250

Record revised

15-Dec-24

Drop measured from

SH973278 · 589 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

Pen y Boncyn Trefeilw is not counted as an independent hill in its own right. In prominence terms it belongs to Foel Cedig (668 m) — the nearest Marilyn you can reach from this summit without first dropping below its key col, 589 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