Gwaun y Llwyni
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
- 685.5 m · 2,249 ft
- Prominence
- 42.6 m
- Grid reference
- SH 85724 20489
- Coordinates
- 52.76984, -3.69531
- County / area
- Gwynedd
- Region
- Bala to Welshpool
- OS Landranger
- 124 125
- OS Explorer
- OL23E
- Summit feature
- grassy knoll
- Key col
- SH 8561 2077 (643 m)
About Gwaun y Llwyni
Gwaun y Llwyni is a subsidiary summit of Aran Fawddwy within the Aran range of southern Snowdonia. Its southern face is very steep and forms one of the backwalls of Cwm Cywarch.
The top is grassy with a small cairn. Pen yr Allt Uchaf rises across Cwm Cywarch, with Aran Fawddwy north-east, Waun Camddwr north and Glasgwm west.
Background written from facts in the Wikipedia article on Gwaun y Llwyni (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
- —
- Daylight
- —
- Civil twilight ends
- —
Computed astronomically for 52.770, -3.695. Plan your finish with the daylight safety planner.
Summit weather live
Loading forecast for the summit (686 m)…
Forecast adjusted to summit altitude. Weather data from MET Norway (CC BY 4.0).
Finding the summit
The recorded summit point is grassy knoll. On broad or flat summits the obvious cairn is not always the true high point.
- Survey method
- Leica RX1250
- Record revised
- 05-Feb-23
- Drop measured from
- SH 8561 2077 · 643 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).
| Place | Type | Rating | Distance |
|---|---|---|---|
| The Buckley Arms Hotel | Hotel/bed & breakfast/guest house | 5 out of 5 | 6.5 km · S |
| Caffi Carys | Restaurant/Cafe/Canteen | 5 out of 5 | 7.9 km · S |
| Rheilffordd Llyn Tegid Railway | Restaurant/Cafe/Canteen | 5 out of 5 | 9.8 km · N |
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
Gwaun y Llwyni is not counted as an independent hill in its own right. In prominence terms it belongs to Aran Fawddwy (906 m) — the nearest Marilyn you can reach from this summit without first dropping below its key col, 643 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 |
|---|---|---|
| Waun Camddwr | 621.7 m | 1 km |
| Pen yr Allt Uchaf | 630.1 m | 1.6 km |
| Aran Fawddwy | 905.6 m | 2 km |
| Glasgwm | 779 m | 2.3 km |
| Gwaun Lydan | 632 m | 2.4 km |
| Erw y Ddafad-ddu | 872 m | 3 km |