3.9
(30)
260
riders
13
rides
Mountain biking around Llyn Nantlle Uchaf offers routes through a landscape characterized by glacial lakes, deep valleys, and surrounding hills. The region, located in Gwynedd, features a mix of lakeside paths and more challenging ascents into the higher terrain. Mountain bike trails in this area often follow natural contours, providing varied riding experiences.
Last updated: July 8, 2026
4.5
(6)
35
riders
19.5km
01:46
500m
500m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(1)
8
riders
33.3km
03:08
920m
920m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.

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5.0
(1)
10
riders
42.7km
03:55
1,100m
1,100m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
4.5
(2)
11
riders
19.8km
01:36
420m
420m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
4.6
(5)
54
riders
16.5km
01:36
280m
280m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
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Through the forest run many paths, wide gravel paths but also narrow paths between the trees.
8
0
Llyn Llywelyn is a small shallow mountain lake surrounded by open moorland and forests. It is a natural spot to pause, picnic and soak up the serene atmosphere before continuing your walk.
8
0
The path along the lake is very nice. Part of it is actually a kind of dam you walk on, with a barrier on both sides so you have to stay on the path. Because the dam is elevated, you have a good view of the lake and the surroundings.
9
0
Stop, look out and listen are the recommendations (to be read on the sign) that you must follow when crossing the track here. It is an unguarded crossing on this railway for tourist trains.
9
0
I think the start and the end is probably the hardest but overall pretty easy path you can’t get lost
0
0
Lovely lunch spot with picnic benches at the waterside
0
0
There are 13 mountain bike trails documented on komoot for the Llyn Nantlle Uchaf area. These routes offer a variety of experiences, from easy lakeside paths to challenging mountain ascents.
The terrain around Llyn Nantlle Uchaf is diverse, featuring glacial lakes, deep valleys, and surrounding hills. You'll find a mix of relatively flat lakeside paths and more challenging ascents into higher terrain, often following natural contours.
Yes, there are trails suitable for beginners and families. For an easier ride, consider the Llyn Llywelyn – Lôn Gwyrfai Lakeside Path loop from Rhyd-ddu. This 10.2-mile (16.5 km) route is rated easy and takes you through scenic lakeside and forest terrain.
For experienced riders seeking a challenge, routes like the Telegraph Valley (Maesgwm) – Snowdon Ranger Hostel loop from Groeslon offer significant elevation gain and expansive views. This difficult route covers 25.7 miles (41.4 km).
Many of the mountain bike trails in the area are loops. For example, the Ty'n Yr Aelgerth Cottage – Telegraph Valley (Maesgwm) loop from Betws Garmon is a moderate 11.5-mile (18.5 km) circular route traversing a scenic valley.
While mountain biking is possible year-round, the spring and autumn months often offer the most pleasant conditions with cooler temperatures and fewer crowds. Summer can be excellent, but trails may be busier. Winter riding is possible, but be prepared for potentially wet and muddy conditions, and shorter daylight hours.
Yes, many routes offer stunning views of the surrounding landscape. Trails that ascend into higher terrain, such as parts of the Telegraph Valley (Maesgwm) – Snowdon Ranger Hostel loop from Groeslon, provide expansive vistas of the valleys and lakes, including Llyn Nantlle Uchaf itself.
The duration of rides varies significantly based on the trail's length and difficulty. Easy routes like the Llyn Llywelyn – Lôn Gwyrfai Lakeside Path loop from Rhyd-ddu can be completed in about 1 hour 36 minutes, while more difficult and longer routes can take several hours.
The mountain bike trails in Llyn Nantlle Uchaf are highly rated by the komoot community, with an average score of 4.0 stars from over 29 reviews. Riders often praise the scenic lake shores, varied terrain, and the mix of challenging climbs and enjoyable descents.
Yes, some routes extend towards nearby Llyn Padarn, offering additional scenic views. For instance, the difficult Telegraph Valley (Maesgwm) – View of Llyn Padarn loop from Waunfawr provides views of Llyn Padarn and covers a distance of 20.7 miles (33.3 km).
Yes, there are routes that pass close to the Llanberis Lake Railway. The Llanberis Lake Railway – Snowdon Inn Campsite loop from Waunfawr is a moderate 13-mile (20.9 km) route that offers a ride through this area.


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