Craig-y-llyn
2 classifications here — HuMP and Simm — belong to lists OpenFell holds only part of, so they have no list page. See how far the coverage goes.
- Height
- 622 m · 2,041 ft
- Prominence
- 132 m
- Grid reference
- SH 66539 11992
- Coordinates
- 52.68910, -3.97606
- County / area
- Gwynedd
- Region
- Dolgellau to Machynlleth
- OS Landranger
- 124
- OS Explorer
- OL23W
- Summit feature
- no feature: ground 5m from fence
- Key col
- SH669127 (490 m)
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 52.689, -3.976. Plan your finish with the daylight safety planner.
Summit weather live
Loading forecast for the summit (622 m)…
Forecast adjusted to summit altitude. Weather data from MET Norway (CC BY 4.0).
Finding the summit
several points for 20m to SW are just lower.
The recorded summit point is no feature: ground 5m from fence. That distinction matters on broad or flat tops, where the obvious cairn is not always the true high point.
- Survey method
- Abney level
- Record revised
- 23-Oct-23
- Drop measured from
- SH669127 · 490 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
Craig-y-llyn 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, 490 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 |
|---|---|---|
| Craig-las | 661 m | 2 km |
| Cyfrwy | 811 m | 4.1 km |
| Craig Cwm Amarch | 791.9 m | 4.5 km |
| Cadair Idris - Penygadair | 892.7 m | 4.7 km |
| Mynydd Moel | 863 m | 6.4 km |
| Tarren y Gesail | 666.9 m | 7.6 km |