NCN82 loop of Cadair Idris from Machynlleth
NCN82 loop of Cadair Idris from Machynlleth
25
riders
04:36
83.3km
1,420m
Road cycling
Prepare for a difficult road cycling challenge on the NCN82 loop of Cadair Idris from Machynlleth. This route spans 51.7 miles (83.3 km) and demands a significant 4654 feet (1418 metres) of elevation gain, typically taking around 4 hours and 36 minutes to complete. As you pedal, you will experience the rugged beauty of Eryri National Park, with views stretching across Cardigan Bay and towards the imposing peaks of Cadair Idris. The landscape is a mosaic of heather and boulders, offering expansive vistas as you climb.
Before you set out, be aware that this route presents specific surface challenges. A notable section between Machynlleth and Dolgellau, often called the 'Black Road,' features gravel and potholes. For this reason, a traditional road bike may not be the best choice for the entire journey. Consider using a hybrid or touring bike equipped with sturdy tires to ensure a smoother and safer ride. Planning your equipment carefully will enhance your experience on this demanding loop.
This challenging NCN82 loop offers a deep dive into the heart of Eryri National Park, showcasing its unique mountainous character. Beyond the panoramic views, you will encounter specific highlights like the Cwm Maethlon, also known as the Happy Valley Climb. This particular ascent is a memorable feature of the route, adding to the overall sense of accomplishment. The journey provides a comprehensive exploration of the region's natural beauty and cycling terrain.
Last updated: April 23, 2026
Waypoints
Start point
Train Station
Get Directions
9.98 km
Highlight (Segment) • Climb
Tip by
28.0 km
Highlight • Cycleway
Tip by
74.6 km
Highlight • Rest Area
Tip by
83.3 km
End point
Train Station
Way Types & Surfaces
Way Types
59.1 km
19.0 km
3.73 km
1.59 km
Surfaces
52.7 km
30.6 km
< 100 m
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Elevation
Highest point (400 m)
Lowest point (0 m)
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Weather
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Wednesday 12 August
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This route was planned by komoot.
This challenging 83.3 km loop, with over 1,400 meters of elevation gain, generally takes around 4 hours and 36 minutes of active cycling time. However, due to its difficulty and the varied terrain, you should allow extra time for breaks, enjoying the views, and navigating the tougher sections.
While listed for racebikes, a significant portion of this route, particularly the 'Black Road' section of NCN82 between Machynlleth and Dolgellau, is gravelly and potholed. It is not suitable for traditional road bikes. A hybrid or touring bike with sturdy tires is highly recommended to handle the rougher byways and forest tracks you'll encounter.
Expect a highly varied and demanding terrain. The route features hilly and incredibly steep sections, some of which are rough, gravelly, and potholed, akin to gravel routes. You'll also encounter wooded tracks, especially through the Coed y Brenin forest. It offers a wilder, more adventurous cycling experience than a purely tarmac route.
The loop boasts breathtaking scenery characteristic of Eryri National Park. Key highlights include the challenging Cwm Maethlon (Happy Valley) Climb, the Scenic Lanes of NCN 82 in Eryri National Park, and the distinctive peaks of Cadair Idris. You'll enjoy stunning panoramic views over Cardigan Bay and the surrounding mountainous landscape.
The best time to cycle this route is generally during the warmer, drier months from late spring to early autumn (May to September). This avoids the harshest winter weather and offers the best chance for clear views and more comfortable riding conditions on the exposed sections.
Machynlleth offers various parking options, including public car parks, which are a convenient starting point for this loop. Specific parking details can often be found on local council websites or by checking navigation apps for parking facilities in the town center.
While the route follows public roads and cycle paths, it's important to be mindful of local regulations. If cycling with a dog, ensure it is well-behaved and under control, preferably on a leash, especially when passing through rural areas with livestock or on shared paths. Always clean up after your dog.
No, you do not need special permits or to pay entrance fees to cycle this route within Eryri National Park. Access to the National Cycle Network and public roads is generally free. However, always respect local signage and private land.
Yes, this route incorporates significant sections of other well-known paths. It follows the National Cycle Network National Route 82 for about 52% of its length and also includes parts of the EuroVelo 2 - Capitals Route (29%) and Lôn Las Cymru (Central) (29%).
Yes, Machynlleth itself has various cafes, pubs, and shops. Along the route, you might find smaller establishments in villages. Notably, Idris Stores is a highlighted facility that could offer a stop for refreshments or supplies.
No, this route is categorized as a 'difficult' and 'hard road ride' requiring 'very good fitness'. The significant elevation gain (1,418m) and the presence of steep, rough, and gravelly sections make it unsuitable for beginner cyclists or those not accustomed to challenging terrain.
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