4.9
(33)
364
riders
27
rides
Gravel biking in Gwynedd offers diverse terrain across its dramatic landscapes and extensive trail network. The region encompasses much of Snowdonia National Park, featuring a blend of mountains, forests, and coastline, alongside former slate quarries. Riders can find a variety of surfaces, from forest roads and hilly tracks to repurposed disused railway lines and country lanes. This provides options for challenging climbs, flowing descents, and gentler, traffic-free paths.
Last updated: April 29, 2026
13
riders
39.9km
03:49
990m
990m
Embark on a challenging gravel biking adventure with the Cregennan Lakes and Mawddach Trail loop from Barmouth. This difficult route spans 24.8 miles (39.9 km) and features a significant 3247 feet (990 metres) of elevation gain, typically taking around 3 hours and 48 minutes to complete. You will experience a dramatic contrast between the flat, well-maintained Mawddach Trail, which follows an old railway line along the estuary, and the demanding climbs towards the beautiful Cregennan Lakes, nestled north of Cadair Idris. Expect varied terrain, from smooth gravel to rougher, unpaved sections with large holes and rocky parts as you ascend.
While the Mawddach Trail portion is accessible to all skill levels, the climb to Cregennan Lakes requires very good fitness. Some gradients can be steep, reaching up to 20% or even 30% in places, and you might encounter technical sections where pushing your bike is necessary. It is often recommended to cycle this loop clockwise, as the ascent to the lakes is more gradual in that direction. Make sure your tires are at least 700x40c to handle the rougher segments near the top.
This route is notable for its stunning scenery, offering panoramic views across the Mawddach Estuary, the picturesque Cregennan Lakes, and the grand Cadair Idris range. On a clear day, you can even see the mountains of Snowdonia and the sea from the lake summit. The Mawddach Trail itself has historical significance, following an old railway line and crossing the Barmouth Bridge, which is the longest timber viaduct in Wales. The Cregennan Lakes are owned by the National Trust and are free to visit.
5.0
(3)
24
riders
15.1km
00:59
50m
50m
Easy gravel ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.

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5.0
(4)
23
riders
20.5km
01:25
390m
380m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(2)
15
riders
69.5km
05:09
1,490m
1,490m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
20
riders
56.8km
03:59
1,130m
1,130m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
13
riders
12.4km
00:59
280m
280m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.5
(2)
32
riders
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(5)
28
riders
19.8km
01:05
110m
100m
Easy gravel ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
13
riders
34.4km
02:33
620m
620m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(3)
13
riders
50.0km
03:43
1,060m
1,060m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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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.
5
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.
5
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Beddgelert is a lovely village below Moel Hebog, and the bridge over the river is a key feature.
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If you smile sweetly you don’t have to pay. There are also public toilets just after this.
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Lovely lunch spot with picnic benches at the waterside
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First, a somewhat adventurous ride on the single track to the parking lot, which costs £5. The easy loop around the lake is very beautiful and relaxing – the sheep roam freely, but they keep their distance. Dogs must be on a leash, of course, but that's not a problem. Enjoy it – and if you're up for more, go for a longer loop. There are a few tables and benches above the parking lot for your picnic. You won't find any litter baskets, so you'll have to take them with you – which is perfectly fine, as it's a nature reserve. Highly recommended.
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Card payments are accepted. The bridge is open to cyclists and walkers 24/7. There is a slot for the toll in the door outside of operating hours.
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This is an example of many miles of the trail in Beddgelert Forest. Quite wide double tracks, compact gravel surfaces, enclosed by mainly pine trees. If it is a windy day and needing an area to ride in which is more sheltered from the wind, then Beddgelert Forest does offer just that
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Gwynedd offers a wide selection of gravel biking routes, with over 35 trails documented on komoot. These routes cater to various skill levels, from easy, flat paths to challenging, long-distance rides.
Yes, Gwynedd has several easy and family-friendly gravel bike routes. A prime example is the Mawddach Trail in Mid Wales from Dolgellau to Barmouth, which follows a disused railway line, offering a largely flat and traffic-free ride along the Mawddach Estuary. This 15.1 km path is part of Gwynedd's 'Lonydd Glas' network, designed for easy access and enjoyment.
Gwynedd's gravel trails offer a diverse range of terrain. You'll encounter everything from smooth forest roads and repurposed disused railway lines to more rugged, hilly tracks and technical slate paths. The region's landscape, encompassing Snowdonia National Park, provides a mix of mountain, forest, and coastal scenery.
Many of Gwynedd's gravel routes are designed as loops, allowing you to start and finish in the same location. For instance, the Cregennan Lakes and the Mawddach Trail loop from Barmouth is a popular circular option, offering significant elevation gain and scenic views around the lakes and estuary.
Gravel biking in Gwynedd offers access to stunning natural and historical landmarks. You can ride past picturesque locations like the Cregennan Lakes, explore ancient woodlands within Gwydir Forest Park, or follow coastal paths along the Mawddach Estuary. The region is also rich in history, with impressive medieval castles such as Caernarfon Castle and Harlech Castle, and former slate quarries that are now UNESCO World Heritage Sites.
Yes, Gwynedd is home to several beautiful waterfalls that can be incorporated into or viewed from gravel bike routes. Notable waterfalls include Aber Falls, Idwal River Waterfall, and Rhaeadr Ddu (Black Falls) Waterfalls. Some routes may also pass by historical sites with waterfalls, such as Rhosydd Quarry — Ruins and Waterfall.
Gwynedd offers gravel biking opportunities year-round, but the best time often depends on your preference. Spring and autumn provide pleasant temperatures and vibrant scenery, while summer offers longer daylight hours. Be prepared for changeable weather conditions, as is typical for North Wales, and always check forecasts before heading out.
While specific cafes directly on every trail might vary, many routes in Gwynedd pass through or near towns and villages where you can find refreshment stops. Popular trails like the Mawddach Trail connect towns such as Dolgellau and Barmouth, offering opportunities for food and drink. Planning your route in advance can help identify suitable stops.
Many of Gwynedd's gravel bike trails are accessible by car, with parking often available near trailheads, especially in popular areas like Coed y Brenin Forest Park or near towns. Public transport options, including local bus services and railway lines, can also provide access to certain starting points, particularly for routes following disused railway lines.
The gravel biking experience in Gwynedd is highly rated by the komoot community, with an average score of 4.8 stars from over 40 reviews. Riders frequently praise the dramatic mountain scenery, ancient woodlands, and coastal paths along estuaries. The variety of trails, from easy, flat paths to challenging climbs, is also a highlight for many.
Absolutely. Gwynedd is known for offering some of the most challenging gravel climbs in the UK. Routes like the Black Road Gravel Pass – Cregennan Lakes loop from Esgairgeiliog Ceinws, covering 69.5 km with significant elevation, provide a demanding experience for advanced riders. Coed y Brenin Forest Park also features new adventure/gravel cycle routes with challenging climbs and descents.
Many trails in Gwynedd, particularly those in national parks and public access areas, are dog-friendly. However, it's always best to check specific trail regulations, especially when passing through farmland or nature reserves, to ensure dogs are permitted and to understand any requirements like keeping them on a lead. Always practice responsible dog ownership by cleaning up after your pet.


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