Best mountain passes around Llangynog are primarily associated with the Berwyn mountain range in North Powys, Wales. The region is known for its rugged landscape and routes that traverse significant elevations. Milltir Cerrig, often referred to as the "Berwyn Pass," is a notable route connecting Llangynog with Bala. This area provides access to higher Berwyn summits and offers varied terrain for outdoor activities.
Last updated: June 26, 2026
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This extraordinary climb is in the northwestern section of Wales in the Snowdonia mountain region. This is the highest paved road and hardest bike climb in Wales. Bwlch y Groes means “Pass of the Cross.”
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Bwlch y Groes is the second highest public road mountain pass in Wales, with a summit altitude of 545 metres. Gospel Pass in south Wales is slightly higher. It lies on minor roads linking Dinas Mawddwy, Llanuwchllyn and Lake Vyrnw
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This is the B4391 that travels over the Berwyns, from Bala in the north to Llangynog in the south. The northern half of the route is also the border of Snowdonia national Park. High point of 486m so great views.
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An awesome climb!! Five stars!! Luckily I descended it on my last encounter. Beware when descending as there is a very sharp left hand bend at the bottom!!
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Awesome road climb, with a nasty little surprise kick up at the top.
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Epic road climb. There's a nasty little kick up at the top!!
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stream bridge climb and surrounding hills...
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Visitors frequently enjoy Bwlch y Groes, which is the second highest public road mountain pass in Wales and a challenging climb. Another popular spot is the Wayfarer Memorial Traverse, a historical site and mountain pass commemorating Walter MacGregor Robinson's cycling escapades. The Hirnant Pass Climb from Rhiwargor is also a challenging route with steep sections and great viewpoints.
The passes offer spectacular panoramic views of the surrounding Berwyn mountains and the Tanat Valley. From higher points, you can often see peaks like Moel Sych, Cadair Berwyn, and Cadair Bronwen, providing a sense of solitude amidst beautiful, often desolate natural landscapes.
Yes, the Llangynog area is known for challenging climbs. Bwlch y Groes is a demanding cycling climb with steep gradients. The Hirnant Pass Climb from Rhiwargor also features steep sections through forests. For hikers, the passes act as starting points for exploring higher Berwyn summits like Cadair Berwyn. You can also find challenging mountain biking routes in the area, such as 'A loop around the Berwyns' or 'Slate Descent Path – Craig Rhiwarth Descent loop from Llandrillo' which are part of the MTB Trails around Llangynog guide.
While the region offers beauty year-round, spring, summer, and early autumn generally provide the most favorable conditions for cycling and hiking. Winter can bring snow, making some passes challenging or impassable, as historically noted with the Wayfarer Memorial Traverse.
The area is characterized by the rugged Berwyn mountain range, wild open moorland, and the scenic Tanat Valley. You'll also find nearby lakes such as Bala Lake, Lake Vyrnwy, and Llyn Celyn, contributing to the region's 'Welsh Lake District' feel.
Yes, the Wayfarer Memorial Traverse is a significant historical site. It commemorates Walter MacGregor Robinson, a cycling enthusiast who wrote about his adventures, including traversing the Berwyn range in snowy conditions. A memorial plaque marks the summit of this pass.
The ascent from Llangynog on Milltir Cerrig (B4391) generally has a good and wide road surface. However, the descent towards Bala can have patches of rough tarmac and potholes, especially after a cattle grid, so caution is advised for cyclists and drivers.
Beyond cycling and driving the passes, the area is excellent for hiking, mountain biking, and running. You can explore various trails, from easy walks like those found in the Easy hikes around Llangynog guide, to challenging mountain biking routes in the MTB Trails around Llangynog guide, and scenic running trails listed in the Running Trails around Llangynog guide.
While the mountain passes themselves can be challenging, Llangynog serves as a base for various walks. There are several easy hikes available, such as the 'Pistyll Rhaeadr – The Cafe loop' or 'Forest Trail Descent – Deep Cave loop from Llangynog', which are detailed in the Easy hikes around Llangynog guide.
Milltir Cerrig, often called the 'Berwyn Pass,' is a key route on the B4391 connecting Llangynog with Bala. It's considered a 'gateway to the Berwyns,' offering access to higher peaks and providing a challenging yet scenic journey for cyclists and drivers through wild moorland. It's also a starting point for exploring the Berwyn summits via a bridleway from the top.
Visitors particularly appreciate the challenging climbs, the stunning panoramic views of the Berwyn mountains and valleys, and the sense of solitude and immersion in nature. The historical significance of routes like the Wayfarer Memorial Traverse also adds to the appeal, along with the opportunities for various outdoor activities like cycling and hiking.


See even more epic mountain passes by checking out these guides around Llangynog: