Black Mountain
4 classifications here — Current County/UA Top, Marilyn, HuMP and Simm — belong to lists OpenFell holds only part of, so they have no list page. See how far the coverage goes.

- Height
- 703.6 m · 2,308 ft
- Prominence
- 155 m
- Grid reference
- SO 25523 35390
- Coordinates
- 52.01188, -3.08659
- County / area
- Herefordshire/Powys
- County top
- Highest point of Herefordshire/Powys
- Region
- Llandovery to Monmouth
- OS Landranger
- 161
- OS Explorer
- OL13N
- Summit feature
- no feature 12m W of path
- Key col
- SO235352 (549 m)
About Black Mountain
Known in Welsh as Twyn Llech, 'hill of the stone', this summit within the Black Mountains has an unusual distinction: it is the only Marilyn to sit exactly on the Welsh–English border, with Powys on one side and Herefordshire on the other.
Its parent peak, Waun Fach, lies to the west. The hill counts as a county top on both historic and current reckonings.
Background written from facts in the Wikipedia article on Black Mountain (hill) (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 52.012, -3.087. Plan your finish with the daylight safety planner.
Summit weather live
Loading forecast for the summit (704 m)…
Forecast adjusted to summit altitude. Weather data from MET Norway (CC BY 4.0).
Finding the summit
summit 350m S at SO 25560 35023 c.20m W of path is 1m lower.
The recorded summit point is no feature 12m W of path. That distinction matters on broad or flat tops, where the obvious cairn is not always the true high point.
- Survey method
- KR 2x Hand Level/Trimble GeoXH 6000
- Record revised
- 19-Mar-19
- Drop measured from
- SO235352 · 549 m
Classification history: Bridge and B&L summit lies 350m south near 703m spot. Herefordshire County Top is probably on the path 12m E of the northern summit or a few metres from the path at the southern summit.
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
One waymarked long-distance route runs 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 |
|---|---|---|
| Offa's Dyke Path | 292 km | over the top |
Route lines © OpenStreetMap contributors (ODbL); distance from the summit computed by OpenFell.
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 Bull's Head | Pub/bar/nightclub | 5 out of 5 | 2.9 km · E |
| Mountain Mayhem | Restaurant/Cafe/Canteen | Exempt from rating | 5 km · SE |
| Trewern Outdoor Education Centre | Restaurant/Cafe/Canteen | 5 out of 5 | 6.6 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.
The Black Mountain group
One other listed summit sits in the same prominence group, with Black Mountain as the independent hill at its head.
| Summit | Height | Drop |
|---|---|---|
| Hatterrall Hill | 531 m | 45 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 |
|---|---|---|
| Twmpa | 690 m | 3 km |
| Rhos Dirion | 713.4 m | 4.8 km |
| Chwarel y Fan | 679 m | 6 km |
| Waun Fach | 811 m | 6.7 km |
| Pen y Gadair Fawr | 800 m | 7.1 km |
| Pen Twyn Mawr | 658 m | 8.8 km |