Stac Rhos

About Stac Rhos

Stac Rhos is a top of Pen y Boncyn Trefeilw in north-east Wales, part of the Hirnantau section of the Berwyn range. The summit carries a small cairn and a boundary stone.

Views from here are extensive but the surrounding flat, featureless moorland gives them little to work with. Cyrniau Nod lies east and Cefn Gwyntog to the south-east. Stac Rhos is listed as a Nuttall at nearly 630 m.

Background written from facts in the Wikipedia article on Stac Rhos (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 52.839, -3.532. Plan your finish with the daylight safety planner.

Finding the summit

The recorded summit point is tiny cairn. That distinction matters on broad or flat tops, where the obvious cairn is not always the true high point.

Survey method

Leica Runner 20/Leica RX1250

Record revised

15-Dec-24

Drop measured from

SH965281 · 604 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.

Which hill this one belongs to

Stac Rhos 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, 604 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