- Height
- 653.1 m · 2,143 ft
- Prominence
- 27.7 m
- Grid reference
- SO 07862 18915
- Coordinates
- 51.86114, -3.33943
- County / area
- Powys
- Region
- Llandovery to Monmouth
- OS Landranger
- 160
- OS Explorer
- OL12E
- Summit feature
- small cairn
- Key col
- SO 0753 1911 (625.4 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 51.861, -3.339. Plan your finish with the daylight safety planner.
Summit weather live
Loading forecast for the summit (653 m)…
Forecast adjusted to summit altitude. Weather data from MET Norway (CC BY 4.0).
Finding the summit
The recorded summit point is small cairn. On broad or flat summits the obvious cairn is not always the true high point.
- Survey method
- Trimble GeoXH 6000
- Record revised
- 19-Oct-14
- Drop measured from
- SO 0753 1911 · 625.4 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.
Long-distance paths past this hill
2 waymarked long-distance routes run within 2.5 km of the summit — useful if you are linking this hill into a longer walk, or want a made path for the approach.
| Route | Total length | From summit |
|---|---|---|
| Beacons Way | 155 km | 2.1 km |
| Taff Trail | 101 km | 2.1 km |
Route lines © OpenStreetMap contributors (ODbL); distance from the summit computed by OpenFell.
Which hill this one belongs to
Allt Lwyd is not counted as an independent hill in its own right. In prominence terms it belongs to Waun Rydd (769 m) — the nearest Marilyn you can reach from this summit without first dropping below its key col, 625 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 Rydd | 769.2 m | 2.4 km |
| Bwlch y Ddwyallt | 754.1 m | 2.8 km |
| Fan y Big | 716.7 m | 4.5 km |
| Cefn yr Ystrad | 617.3 m | 5.2 km |
| Cribyn | 795 m | 6 km |
| Pen y Fan | 886 m | 7.2 km |