Moel yr Ogof
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
- 655 m · 2,149 ft
- Prominence
- 118 m
- Grid reference
- SH 55627 47863
- Coordinates
- 53.00854, -4.15328
- County / area
- Gwynedd
- Region
- Snowdonia
- OS Landranger
- 115
- OS Explorer
- OL17W 254
- Summit feature
- small cairn
- Key col
- SH559475 (537 m)
About Moel yr Ogof
Moel yr Ogof is a subsidiary summit of Moel Hebog in Snowdonia, paired with the slightly lower Moel Lefn. Its distinguishing feature is industrial: a trial mine for asbestos was driven at the summit after a thin seam of white asbestos was found there, but the quantity proved too small to be worth working commercially.
Background written from facts in the Wikipedia article on Moel yr Ogof (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
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- Sunset
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- Daylight
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- Civil twilight ends
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Computed astronomically for 53.009, -4.153. Plan your finish with the daylight safety planner.
Summit weather live
Loading forecast for the summit (655 m)…
Forecast adjusted to summit altitude. Weather data from MET Norway (CC BY 4.0).
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 |
|---|---|---|
| Snowdonia Slate Trail | 135 km | 2 km |
Route lines © OpenStreetMap contributors (ODbL); distance from the summit computed by OpenFell.
Which hill this one belongs to
Moel yr Ogof is not counted as an independent hill in its own right. In prominence terms it belongs to Moel Hebog (784 m) — the nearest Marilyn you can reach from this summit without first dropping below its key col, 537 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 |
|---|---|---|
| Moel Lefn | 638 m | 0.8 km |
| Moel Hebog | 783.7 m | 1.3 km |
| Craig Cwm Silyn | 734 m | 3.9 km |
| Trum y Ddysgl | 709.7 m | 3.9 km |
| Mynydd Drws-y-coed | 695 m | 4 km |
| Mynydd Tal-y-mignedd | 653 m | 4.1 km |