The full Nantlle Ridge traverse is a one-way walk, from Rhyd Ddu to Nebo. The real planning question is how you get back to the start.
Between the two ends sits one short main scramble, and the guides disagree on how hard it is. They also disagree on whether you can avoid it.
The rest is mostly ridge walking, with a few awkward steps.
How long and how hard
According to The Great Outdoors (TGO), Rhyd Ddu to Nebo is 13.6 km with 983 m of climbing. Its route includes Mynydd Graig Goch, the last top.
The Mud and Routes traverse from Rhyd Ddu to Nebo is 14.03 km with 962 m of climbing.
| Guide, Rhyd Ddu to Nebo | Distance and climbing | Time |
|---|---|---|
| TGO | 13.6 km, 983 m | 7 hours |
| Mud and Routes | 14.03 km, 962 m | 6 hours |
Between Nebo and Rhyd Ddu, Visit Wales gives 11 km and 4.5 to 8 hours, in one direction.
Allow 4.5 to 8 hours and 11 to 14 km, depending on the guide.
TGO lists Ordnance Survey 1:25,000 map OL17 for the walk.
A quieter day than Snowdon
According to Walking Britain, the chances are you can walk the ridge without seeing another soul all day.
It reports having the ridge to itself on a Bank Holiday Monday in May. A walker quoted by Visit Wales, Chris Knight, saw nobody across the whole hike.
Mud and Routes still finds people stopping for lunch on Trum y Ddysgl.
On a day of low cloud, the lake walks from Rhyd Ddu stay low.
Starting at Rhyd Ddu
Start from the Rhyd Ddu Path car park or from the Welsh Highland Railway station in the village. Mud and Routes lists a toilet at the car park and a pub and tearoom in the village.
The ridge is in view to the west from the start.
Cross the road and follow the waymarked field path. Walking Britain describes a metal kissing gate and slate slabs laid as stepping stones.
Mud and Routes adds that the path is straightforward, with arrows and “Private” signs along the way.
Y Garn, the first top of the ridge
The first top is Y Garn at 633 m. Go4awalk labels it Y Garn (Moel Hebog). Mud and Routes says lists call it Y Garn II, to tell it apart from Y Garn in the Glyderau.
Mud and Routes calls this part of the ridge a slog. Expect about an hour of dragging yourself up a muddy, eroded track, for about 450 m of climbing.
Another guide, walk-snowdonia, calls the same climb an easy ascent.
After an hour or a little more, Mud and Routes says the path eases off. There are two summit shelters to choose from.
Mynydd Drws-y-Coed and the scramble
Mynydd Drws-y-Coed, at 695 m, is the main scramble.
Go4awalk describes the arete up to the summit as steep, narrow and quite airy in places. It says to try it only in good weather and with a good head for heights.
Each number below is one guide’s opinion:
- Mud and Routes: calls Drws-y-Coed a grade 0.5 scramble. Its route box lists Scrambling Grade 1, and some sections are Grade 1, but only just.
- TGO: says guidebooks class the ridge as a three-star grade one scramble. Exposure is never critical but may unnerve newcomers, and it recommends previous grade-one experience.
- Walking Britain: grades the ascent 1 to 2, with a lot of exposure.
- 2011 guided-walking post: Hillcraft Guided Walking, in 2011, noted it is classed as a grade 1 rock scramble and called that probably over-graded, with only a couple of places where you stop and think.
The guides split on whether you can dodge the hard moves.
Walking Britain says the scrambling is not easily avoided and the route is not for anyone without a head for heights. Mud and Routes says a few moves can be avoided by dropping down.
Where Walking Britain describes two or three choices of line, it calls the ones nearest Rhyd Ddu generally the safest.
Mud and Routes puts the ridge below Crib Goch or Tryfan for technical level, and nowhere near as exposed.
Walking Britain says to avoid the route when it is wet, and when wind is forecast. Hillcraft found the slate still a bit greasy after damp weather.
Some big drops and past accidents here, Walkingworld notes, so it asks for care, especially in wet conditions. Check the mountain forecast first.
Mud and Routes calls the ridge a serious proposition in winter conditions.
Trum y Ddysgl and the Hiatus
Next comes Trum y Ddysgl, at 709 m. The name means Dish Ridge, per go4awalk.
Walking Britain describes a simple walk on a good path, set a couple of metres back from the ridge edge.
In mist, take care at the summit. Walk-snowdonia warns that it is all too easy to miss the turning up to the right that reaches the top. You then contour around instead.
Then comes the notch between Trum y Ddysgl and Tal-y-mignedd, which some call the Hiatus.
Mud and Routes says the notch has much more exposure than you would expect. The path drops to the col and climbs out again, with one or two awkward steps, according to Walking Britain.
TGO describes a small rock step in the middle of the narrow col that needs careful negotiation.
The obelisk on Mynydd Tal-y-mignedd
At 653 m, Mynydd Tal-y-mignedd is the top with the obelisk. Mud and Routes says you cannot miss it.
The large stone obelisk was put up, Wikipedia says, to commemorate Queen Victoria’s Diamond Jubilee. Here you decide whether to go on or turn round.
Walkingworld says this route can take you back to Rhyd Ddu from here, or on to Nebo.
Walk-snowdonia suggests going back the way you came. Its other option is a path into Cwm Pennant, which it says has become more overgrown in recent years.
Walking Britain’s half-ridge route drops northwest from the obelisk, mostly without a path, and says map and compass proficiency is required.
Across Cwm Pennant lies Moel Hebog, which has its own page.
Craig Cwm Silyn and the way down to Nebo
The descent to Bwlch Dros-bern is not pleasant, according to Mud and Routes: eroded and steep.
Craig Cwm Silyn is the highest point on the ridge, per Visit Wales. Go4awalk and TGO give its height as 734 m.
Mud and Routes warns that Craig Cwm Silyn has two summits. The second has a square stone tower, but the actual summit is the first.
TGO says the final scramble of the day, on the northern flank of Craig Pennant, can be avoided 100 m to the west.
After that TGO lists Garnedd-goch at 700 m, then Mynydd Graig Goch at 610 m.
From there, TGO follows wooden stakes northwest for 1 km to Llyn Cwm Dulyn. At the outflow, follow the lane for 1.2 km to the crossroads in the centre of Nebo.
Closing the loop
The bus from Nebo to Rhyd Ddu is two buses, per Visit Wales, with a change in Caernarfon, taking around 1 hour 20 minutes.
- Bus, first leg: the G5 from Nebo to Caernarfon. Bustimes.org lists it as run by Dilwyn’s Coaches, with stops in Nebo village. When read in October 2026, its dates showed Monday to Saturday.
- Bus, second leg: the S3 Sherpa’r Wyddfa. The Eryri National Park Authority, the public body that manages the park, lists the S3 from Caernarfon to Rhyd Ddu Station. From Porthmadog, take the S4 to Beddgelert and change to the S3.
- Two cars or a taxi: Visit Wales recommends two cars for a group. Mud and Routes says parking in Nebo itself is not practical. It names a spot on the Cwm Dulyn road near Nebo for a second car, at grid reference SH483 500.
We compile and explain public route and safety information. We guide nobody and sell nothing on the hill.
Do not start until the way back is settled. Leave the second car at the Cwm Dulyn road spot, or check Traveline Cymru for the G5 on the day you walk.
