5.0
(5)
126
riders
02:46
25.8km
930m
Mountain biking
This difficult 16.0-mile mountain biking route on Cadair Idris offers technical terrain and stunning views in Eryri (Snowdonia) National Par
Last updated: February 26, 2026
Tips
Includes very steep uphill segments
You may need to push your bike.
After 8.17 km for 1.03 km
After 10.0 km for 2.75 km
Waypoints
Start point
Parking
Get Directions
523 m
Highlight (Segment) • Forest
Tip by
12.8 km
Highlight • Summit
Tip by
13.0 km
Highlight (Segment) • Summit
Tip by
25.8 km
End point
Parking
Way Types & Surfaces
Way Types
10.3 km
9.24 km
6.23 km
< 100 m
Surfaces
11.5 km
10.2 km
3.59 km
381 m
< 100 m
< 100 m
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Elevation
Highest point (850 m)
Lowest point (20 m)
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Weather
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Tuesday 5 May
13°C
5°C
16 %
Additional weather tips
Max wind speed: 2.0 km/h
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This route was planned by komoot.
No, this trail is generally considered difficult and is not suitable for novices. It's best suited for intermediate-plus riders who are comfortable with technical natural riding. You'll encounter steep, rocky climbs, technical descents, and likely some 'hike-a-bike' sections where you'll need to push or carry your bike.
The terrain is varied and technical. Expect steep, rocky climbs, often requiring you to push your bike. Some sections, like near the Pony Path, are described as 'steep, rocky, boulder fields'. The path can have 'paved' sections of igneous rock, which can be challenging with sharp edges. Descents are fast and technical, over bedrock, boulder, and shale. Short grass can be very slippery, even with slight moisture, leading to unpredictable grip.
The most legitimate route for mountain bikers to reach the summit and descend is via the bridleway from Llanfihangel-y-Pennant. Other routes are generally footpaths and not suitable for bikes.
You can expect stunning panoramic scenery throughout the ride. The mountain itself is striking, with imperious cliffs, enticing ridges, and pretty tarns. From higher elevations, there are spectacular views out to the sea and of the mountain's northern face. A circuit around Cadair Idris offers 'jaw-dropping' views, especially from the high bwlch (col) of Esgair Berfa.
The route offers several notable highlights. You'll pass through the Abergynolwyn to Post Ystumanner Trail, experience the challenge of reaching the Penygadair summit, Cadair Idris, and navigate the thrilling Descent from Cadair Idris Summit.
The best time to mountain bike Cadair Idris is typically during the drier months, from late spring to early autumn (May to September). This avoids the worst of winter weather and potentially very slippery conditions. Always check the weather forecast before you go, as conditions can change rapidly on the mountain.
Generally, you do not need a specific permit to mountain bike on designated bridleways within Eryri (Snowdonia) National Park. However, it's crucial to stick to bridleways and public rights of way where cycling is permitted. Always follow the Countryside Code, respect the environment, and be mindful of other trail users. There are no entrance fees for the National Park itself.
While dogs are generally welcome in Eryri (Snowdonia) National Park, mountain biking on Cadair Idris is a challenging and technical route. If you choose to bring your dog, ensure they are fit enough for long, strenuous climbs and descents, and that they are kept under close control, preferably on a lead, especially around livestock and other trail users. Consider the rocky and potentially sharp terrain on their paws.
For the most legitimate mountain biking route to the summit, parking near Llanfihangel-y-Pennant would be appropriate to access the bridleway. Specific parking areas can vary, so it's advisable to check local signage or online resources for designated parking spots before your visit.
Cadair Idris offers a true 'big mountain' experience, distinct from dedicated trail centers, with wilder, natural trails. It's often seen as a good 'starter mountain' for riders looking to progress to larger mountain ascents and descents like Snowdon, as the hardest technical sections are at the top. Its combination of significant climbs, technical descents, and hike-a-bike sections makes it a unique and iconic challenge in Mid Wales.
Yes, the route also passes through sections of the Cambrian Way, the Mynydd Moel-Tyrrau Mawr ridge walk, and the Pony Path.