Mynydd Llysiau

About Mynydd Llysiau

Mynydd Llysiau is a subsidiary summit of Waun Fach in the Black Mountains of south-eastern Wales, sitting halfway along the line between Waun Fach and Pen Allt-mawr.

It is a well-defined hill with a steep eastern face, its summit a long grassy ridge marked by a pile of stones. Southwards the ground runs to Pen Twyn Glas, and before it stand two boundary stones with the look of grave stones.

Background written from facts in the Wikipedia article on Mynydd Llysiau (CC BY-SA 4.0). Heights, prominence and grid references come from the Database of British & Irish Hills, not from Wikipedia.

Access rights here

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

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Sunset

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Daylight

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Civil twilight ends

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Computed astronomically for 51.944, -3.155. Plan your finish with the daylight safety planner.

Finding the summit

The recorded summit point is cairn. 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

SO211267 · 621 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

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 lines © OpenStreetMap contributors (ODbL); distance from the summit computed by OpenFell.

Which hill this one belongs to

Mynydd Llysiau is not counted as an independent hill in its own right. In prominence terms it belongs to Waun Fach (811 m) — the nearest Marilyn you can reach from this summit without first dropping below its key col, 621 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