Best mountain passes around Corris are situated in the Dulas Valley within Southern Eryri National Park. This area is characterized by its rugged landscape, shaped by a history of slate quarrying. The region offers a network of trails that traverse mountainous terrain, providing access to elevated routes and scenic viewpoints. It serves as a base for exploring the natural beauty and historical significance of the surrounding Welsh countryside.
Last updated: July 1, 2026
Highlight (Segment) • Mountain Pass
Tip by
Highlight • Structure
Tip by
Sign up now to discover places like this
Get recommendations on the best single tracks, peaks, & plenty of other exciting outdoor places.
Sign up for free
Highlight • Viewpoint
Tip by
Highlight • Viewpoint
Tip by
Highlight (Segment) • Viewpoint
Tip by
Sign up for free to discover even more mountain passes around Corris.
Sign up for free
Already have an account?
Start today with a free account
Your next adventure awaits.
Login or Signup
Great mountain road, rideable on a gravel, comfortable on an MTB
0
0
This is the first proper off-road section on Traws Eryri heading north. If you're riding an MTB with nice big tyres it's a blast, but if you're on a gravel bike, it's a long, picky descent.
0
0
Heading south, this is a great, usually traffic-free descent. Heading north it's a hard climb with some 15%+ ramps especially towards the top.
0
0
Heading south, once you're away from the main road this is a lovely steady climb with a few steep ramps. Look out for plane-spotters who hang-out at the top waiting for military aircraft doing the low-flying 'Mach Loop'.
0
0
Lovely quite road with some good hills, but it's worth it for the views.
0
0
Easy parking stop to explore the Cloddfa Gwanas slate quarry & Cribin Fawr
2
0
It's a long slog of a climb from the south - but don't despair the scenery is amazing, and well worthy of every pedal stroke.
1
0
The region offers several popular mountain passes. Black Road Gravel Pass is a challenging route with stunning views of Barmouth. Another favorite is the Minor Road Pass in Parc Cenedlaethol Eryri, known for its traffic-free cycling and opportunities for plane-spotting. For a historical experience, the Aberllefenni Slate Quarry Cycle Route takes you past remnants of old slate quarries.
The terrain varies, offering a mix of experiences. You'll find gravel paths, some of which can be loose, as well as quiet backroads and challenging technical sections. Many routes feature steady climbs with steep ramps, rewarding you with breathtaking views. Some passes, like the Aberllefenni Slate Quarry Cycle Route, are traffic-free cycle paths.
Yes, the passes offer numerous scenic viewpoints. From Black Road Gravel Pass, you can enjoy amazing views of Barmouth and its bay. The area is also characterized by the dramatic landscape of Southern Eryri (Snowdonia) National Park, with prominent features like Cadair Idris often visible. You'll also encounter remnants of the region's slate quarrying history, adding a unique cultural element to the natural beauty.
Corris is a fantastic base for outdoor activities. You can enjoy extensive cycling, including touring, gravel, and mountain biking on routes like the Cycling around Corris guide. For mountain biking enthusiasts, the MTB Trails around Corris offer challenging options like the ClimachX MTB Trail. Hiking and walking are also popular, with trails traversing the rugged landscape and offering views of Cadair Idris.
The region's rich slate quarrying history is evident along many routes. The Aberllefenni Slate Quarry Cycle Route, for example, leads past remnants of old slate quarries and slag heaps, offering a glimpse into the area's industrial past. The fences made of slate stones are a unique cultural detail to look out for.
While the passes can be enjoyed year-round, clear skies offer the best experience for panoramic views, especially from passes like Black Road Gravel Pass. The trails are exposed, so appropriate clothing is essential, particularly when the weather changes. Spring and autumn often provide pleasant temperatures and vibrant scenery, while summer offers longer daylight hours.
While some routes feature challenging climbs and loose surfaces, there are options for various skill levels. The region's network of trails includes varied terrain, and some traffic-free paths might be suitable for older children or those with some cycling experience. Always check the specific route details for difficulty and suitability before heading out with family.
Many outdoor trails in the Eryri (Snowdonia) National Park are dog-friendly, but it's always recommended to keep dogs on a lead, especially in areas with livestock or ground-nesting birds. Be mindful of the terrain and any specific signage on individual routes.
The Minor Road Pass in Parc Cenedlaethol Eryri is particularly popular with cyclists due to its traffic-free nature and steady climbs. It's also known as a spot for plane-spotting, as military aircraft frequently conduct low-flying training in the 'Mach Loop' area, offering a unique spectacle for visitors.
Beyond the immediate vicinity, the broader region offers other notable passes. **Bwlch Llyn Bach** is directly associated with the Corris area on the A487. Further afield, the **Tal-y-llyn Pass** near Cadair Idris is considered one of Wales' most spectacular, and **Bwlch y Groes** is a winding mountain road popular with drivers and bikers, known for its unforgettable views.
Visitors frequently praise the breathtaking views, especially those overlooking Barmouth and its bay from passes like Black Road Gravel Pass. The challenging yet rewarding climbs, the sense of isolation on some trails, and the unique blend of natural beauty with historical slate quarry remnants are also highly appreciated. The traffic-free nature of some routes is a big draw for cyclists.
For detailed cycling routes, you can explore guides such as Cycling around Corris, MTB Trails around Corris, and Road Cycling Routes around Corris. These guides provide information on various routes, including distances and difficulty grades, suitable for different types of bikes and experience levels.


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