List of Highest Roads in Wales

This page provides a list of the highest paved roads in Wales, split into two lists - the first being public roads maintained by a Highway Authority, and the second those private roads inaccessible to the general public in motor vehicles, although paved and drive-able.

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Incomplete List/Needs more references. Also see - Welsh Hill Passes; the information and detail on both pages needs to be combined into a single page

Public Roads

Rank	Height (m)	Height (ft)	Name	Between	Road number	County	Road Type	Notes	OS grid reference
1	549	1,801	Gospel Pass	Hay-on-Wye and Abergavenny	C79	Brecknockshire	Pass	Highest road in Wales	SO236352
2	545	1,788	Bwlch y Groes	Llanuwchllyn and Dinas Mawddwy	unclassified	Merionethshire	Pass	Highest road in North Wales	SH913233
3	534	1,751	Bwlch y Cloddiau	West of Llangurig and Afon Diliw	unclassified	Montgomeryshire	Dead End		SN853782
4	531	1,742	Dol-y-Moch	Bronaber and Llanuwchllyn	unclassified	Merionethshire	Pass		SH784333
5	527	1,729	A4107	Abergwynfi and Treorchy	A4107	Glamorgan	Pass	Highest A-Road in Wales	SS920951
6	518	1,699	Llangynidr Mountain	Beaufort and Llangynidr	B4560	Brecknockshire	Pass		SO162159
=7	512	1,679	Blorenge	Llanfoist and Blaenavon	unclassified	Monmouthshire	Pass		SO263107
=7	512	1,679	Rhiw Fawr	Machynlleth and Staylittle	unclassified	Montgomeryshire	Pass		SN837955
9	507	1,663	Cwm Hirnant	Lake Vyrnwy and Rhos-y-gwaliau	unclassified	Merionethshire / Montgomeryshire	Pass		SH946273
10	503	1,650	Rhigos Road	Treherbert and Hirwaun	A4061	Glamorgan	Pass		SN922028
11	493	1,617	Black Mountain Road	Llangadog and Brynamman	A4069	Carmarthenshire	Pass		SN730184
12	488	1,601	Penrhiw-wen	Rhayader and Cwmystwyth	unclassified	Radnorshire	Pass		SN920708
13	486	1,594	Milltir Cerrig	Llangynog and Bala	B4391	Merionethshire / Montgomeryshire	Pass		SJ017305
14	485	1,591	B4407	Llan Ffestiniog and Ysbyty Ifan	B4407	Caernarfonshire / Merionethshire	Pass		SH760435

Private Roads

Rank	Height (m)	Height (ft)	Name	Between	Road number	County	Road Type	Notes	OS grid reference
1	654	2,145	Marchlyn Mawr Surge Pond	Deiniolen and Marchlyn Mawr	unclassified	Caernarfonshire	Dead End	Access road to surge pond	SH600610
2	641	2,103	Marchlyn Mawr Dam	Deiniolen and Marchlyn Mawr	unclassified	Caernarfonshire	Dead End	Access road to dam	SH613620
3	555	1,820	Ffynnon Llugwy	A5 East of Llyn Ogwen and Ffynnon Llugwy	unclassified	Caernarfonshire	Dead End	Access road to reservoir	SH694623
4	502	1,646	Ffestiniog Power Station	Tanygrisiau and Ffestiniog Power Station	unclassified	Merionethshire	Dead End	Access road to dam.	SH666445

References

• Ordnance Survey maps, 1:25000 and 1:50000