Cyfrwy
One classification here — Simm — belongs to a list OpenFell holds only part of, so it has no list page. See how far the coverage goes.

- Height
- 811 m · 2,661 ft
- Prominence
- 31 m
- Grid reference
- SH 70395 13337
- Coordinates
- 52.70212, -3.91957
- County / area
- Gwynedd
- Region
- Dolgellau to Machynlleth
- OS Landranger
- 124
- OS Explorer
- OL23W
- Summit feature
- ground c15m S of shelter
- Key col
- SH705130 (780 m)
About Cyfrwy
Cyfrwy is a subsidiary summit of Cadair Idris, immediately to its west in Eryri. Many walkers take it in alongside Cadair Idris using the Pony Path.
The top is bare rock with a cairn. Large cliffs fall from the north and east faces, and these hold the Cyfrwy Arete, a very steep rock climb or extreme scramble calling for rope and rock climbing skills. Tyrrau Mawr and Craig-y-llyn lie west, Craig Cwm Amarch south.
Background written from facts in the Wikipedia article on Cyfrwy (CC BY-SA 4.0). Heights, prominence and grid references come from the Database of British & Irish Hills, not from Wikipedia.
Access rights here
Conditional Right to roam: Right to roam only on mapped CRoW open access land.
Permission needed Wild camping: Permission needed everywhere.
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
- —
- Sunset
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- Daylight
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- Civil twilight ends
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Computed astronomically for 52.702, -3.920. Plan your finish with the daylight safety planner.
Summit weather live
Loading forecast for the summit (811 m)…
Forecast adjusted to summit altitude. Weather data from MET Norway (CC BY 4.0).
Which hill this one belongs to
Cyfrwy is not counted as an independent hill in its own right. In prominence terms it belongs to Cadair Idris - Penygadair (893 m) — the nearest Marilyn you can reach from this summit without first dropping below its key col, 780 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
| Peak | Height | Distance |
|---|---|---|
| Cadair Idris - Penygadair | 892.7 m | 0.8 km |
| Craig Cwm Amarch | 791.9 m | 1.4 km |
| Mynydd Moel | 863 m | 2.4 km |
| Craig-las | 661 m | 2.7 km |
| Gau Graig | 683.7 m | 4 km |
| Craig-y-llyn | 622 m | 4.1 km |