Black Mixen
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
- 650 m · 2,133 ft
- Prominence
- 45 m
- Grid reference
- SO 19652 64402
- Coordinates
- 52.27185, -3.17898
- County / area
- Powys
- Region
- Welshpool to Hay-on-Wye
- OS Landranger
- 148
- OS Explorer
- 200E
- Summit feature
- trig point
- Key col
- SO188650 (605 m)
About Black Mixen
Black Mixen, or Y Domen Ddu in Welsh, is a subsidiary summit of Great Rhos in the Radnor Forest. The top is an expanse of peat bog plateau, carrying a cairn alongside a radio transmitter and its building — the only Nuttall with a communications mast on its summit.
The cairn is thought to be Bronze Age, in keeping with similar barrows on other peaks nearby. Bache Hill lies east, the Great Rhos plateau west, and the Black Mountains stretch away to the south.
Background written from facts in the Wikipedia article on Black Mixen (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 52.272, -3.179. Plan your finish with the daylight safety planner.
Summit weather live
Loading forecast for the summit (650 m)…
Forecast adjusted to summit altitude. Weather data from MET Norway (CC BY 4.0).
Finding the summit
The recorded summit point is trig point. On broad or flat summits the obvious cairn is not always the true high point.
- Survey method
- obvious summit
- Record revised
- 28-Oct-01
- Drop measured from
- SO188650 · 605 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.
Reaching Black Mixen by train
2 National Rail stations sit within 8 km of the summit — close enough to make a car-free day of it. Distances are straight lines, not walking routes.
| Station | From summit | Summit lies |
|---|---|---|
| Dolau | 6.3 km | SE of the station |
| Llanbister Road | 7.6 km | S of the station |
Each station page lists every hill in its reach, long-distance paths from the door and a live-times link — see all stations with hills in reach. Station positions from NaPTAN (OGL v3.0).
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 Radnor Arms | Pub/bar/nightclub | 4 out of 5 | 3.9 km · SE |
| Fforest Inn | Pub/bar/nightclub | 5 out of 5 | 5.6 km · S |
| Powells Farm Wales - Pop Up Cafe | Restaurant/Cafe/Canteen | 5 out of 5 | 6.2 km · SW |
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
Black Mixen is not counted as an independent hill in its own right. In prominence terms it belongs to Great Rhos (660 m) — the nearest Marilyn you can reach from this summit without first dropping below its key col, 605 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 |
|---|---|---|
| Great Rhos | 660 m | 1.5 km |
| Bache Hill | 610 m | 1.8 km |
| Whimble | 598.8 m | 2 km |
| Fron-wen | 546 m | 2.2 km |
| Nyth-grug | 538 m | 4.5 km |
| Llanfihangel Hill | 532.2 m | 9 km |