Moel Siabod

Moel Siabod

Overview and summit

Moel Siabod rises above Capel Curig and Dolwyddelan in Eryri (Snowdonia). DoBIH records a height of 872.2 m (2,862 ft), prominence of 599.9 m and summit grid reference SH705546. The highest natural point is a rock about 4 m west-southwest of the trig pillar. A nearby stone shelter is a landmark, not an indoor refuge.

The source classifications are Marilyn, Simm, Hewitt, Nuttall and High Hills of Britain. A display rounded to 600 m prominence should not be interpreted as P600 membership. The source also notes a LIDAR-based alternative drop of 599.7 m.

Choosing an approach

These are planning notes, not a turn-by-turn guide. Select a complete mapped itinerary, check access notices and allow for your party’s pace, conditions and return journey.

• Daear Ddu is the southeast ridge above Llyn y Foel. The crest is a Grade 1 scramble: hands-on movement, exposure and route choice matter. It is distinct from the northern walking approaches.
• The Plas y Brenin / Llynnau Mymbyr approach climbs the northern hillside without visiting Llyn y Foel. It can be reversed for an out-and-back walk.
• Pont Cyfyng gives access to the east/northeast ridge. A lower northern path avoids its rocky crest; woodland links can make a circuit via Plas y Brenin.
• A westward traverse towards Pen y Gwryd crosses Bwlch Rhiw’r Ychen, with Carnedd y Cribau as an optional detour. Arrange transport for this linear walk.
• From Dolwyddelan, forestry paths approach Llyn y Foel from the south. Beyond the trees the line can be faint; choose deliberately between the scramble and the steep walking alternative.

No single distance, ascent or completion time applies to all these variants. Plan the descent as carefully as the ascent; do not treat Daear Ddu as an easy default descent.

Ground, geology and views

Expect rough rock, grass, boggy ground, steep slopes and indistinct paths. The BGS geological account identifies substantial dolerite sills along Moel Siabod, associated with sedimentary and volcanic rocks. Its crags cannot accurately be explained simply as rhyolitic lava flows.

Clear weather can reveal Yr Wyddfa’s horseshoe, Tryfan, the Glyderau and the Carneddau. Visibility depends on the day’s conditions, not a guaranteed season.

Access and facilities

Bryn Glo beside the A5, around SH735571, is a documented starting area for Pont Cyfyng routes. Check current signs, restrictions and capacity before leaving a vehicle. SH705546 is the summit, not a car park. Plas y Brenin’s parking is for course attendees and centre visitors; ask before assuming it is available for an all-day independent walk.

The S1 bus connects Betws-y-Coed station with Capel Curig and Plas y Brenin. Dolwyddelan station offers another rail access point for a southern start. Check current timetables and the last suitable return before setting out.

Capel Curig has places to eat, including Caffi Siabod on the A5. Check opening hours and parking arrangements with the operator. Do not rely on public toilets being open; carry food and drinking water for the walk.

Use established paths through farmland, respect gates and livestock, and check current local access notices. A described route does not guarantee parking permission or that it is open in all circumstances.

Safety

Wet rock can be very slippery, especially on the ridges. Crags, steep ground and bogs complicate route-finding; mist can make the correct summit exit difficult to identify. Strong wind and rapidly changing weather can make exposed sections unsuitable.

Snow and ice change these summer routes into winter mountaineering terrain. Appropriate winter skills and equipment are needed; a summer scrambling grade is not a winter difficulty assessment.

Check the mountain forecast, carry a map and compass and know how to use them. Take suitable clothing, food, water, a torch and emergency supplies. Tell someone your plan, match it to the least experienced person in your party and turn back if conditions are unsuitable. In a mountain emergency call 999, ask for Police, then Mountain Rescue.

Name and local history

The meaning of Siabod is uncertain; published explanations differ, so a definitive English translation is not given here. Disused quarry workings on the Pont Cyfyng approach are a visible part of the local industrial landscape.

Sources

• DoBIH / Hill Bagging, Moel Siabod 1980
• BGS geological memoir
• OS: Daear Ddu route
• UKHillwalking route account
• Rockfax guidebook preview, pp. 226–227
• Mud and Routes: Dolwyddelan approach
• Eryri safety advice
• Sherpa’r Wyddfa timetables