9 Best Mountain Bike Trails in Snowdonia (2025)

Coed y Brenin — MBR & Temtiwr

The original and still the king. The UK's first purpose-built trail centre is still one of the best.

Coed y Brenin pioneered mountain biking in the UK when it opened its first purpose-built trail in 1996. Nearly 30 years later, it's still exceptional. The MBR (red grade) trail is the star — flowing singletrack through ancient oak woodland with roots, rocks, berms, and natural features that reward skill. Temtiwr (black) adds technical challenge. The trail centre facilities are excellent and the forest setting is gorgeous. It's the benchmark that other UK trail centres aspire to.

Antur Stiniog

Wales's best gravity park. Uplift runs on everything from flow trails to gnarly rock gardens.

Antur Stiniog is the best gravity riding in Snowdonia and one of the best in the UK. Built in the old Stiniog slate quarries above Blaenau Ffestiniog, it uses uplift vans to shuttle riders to the top of multiple downhill trails. The trails range from smooth flow runs to genuinely gnarly rock gardens through the industrial ruins. The quarry setting is atmospheric and unlike any other trail centre. This is where North Wales gravity riders go.

Penmachno Trails

Built by riders, for riders. The most technical natural singletrack in Wales.

Penmachno is special because it was built and maintained by local volunteers, giving it a raw, natural feel that sanitised trail centres lack. The trails are tight, technical, and rooty — proper natural singletrack that rewards bike handling over fitness. The setting in the Machno Valley is beautiful, and the community spirit is palpable. Riding here feels like mountain biking should feel.

Marin Trail (Gwydir Forest)

The classic North Wales mountain bike trail — proper cross-country riding with big views.

The Marin Trail was one of the first waymarked mountain bike routes in Wales and it's still a cracker. A red-graded XC loop through Gwydir Forest above Betws-y-Coed, it packs in steep forest road climbs rewarded by flowing singletrack descents through atmospheric forest. The views out to the Snowdonia peaks are stunning. It's a proper workout that tests fitness and bike handling equally.

Gwydir Bach & Mawr

Betws-y-Coed's home trails — from gentle family loops to proper technical riding.

Gwydir Bach (the smaller loop) and Gwydir Mawr (the bigger loop) between them offer everything from gentle family riding to technical singletrack. Based in the forests around Betws-y-Coed, they're the most accessible trails in Snowdonia — you can be riding within 5 minutes of parking. The Bach loop is perfect for beginners, while Mawr has some excellent technical sections through old mine workings. The Betws-y-Coed infrastructure (bike shops, cafés, accommodation) makes these ideal for a riding weekend.

Dyfi Trails (Machynlleth)

Home of the Dyfi Enduro and some of the best natural riding in Wales.

The trails around Machynlleth at the southern edge of Snowdonia are legendary in the Welsh MTB community. The famous ClimachX trail is a red-graded enduro-style route with long, technical descents and properly earned climbs. The Dyfi Enduro race uses these trails, and the riding is natural, varied, and challenging. Machynlleth itself is a fantastic mountain biking hub with shops, accommodation, and a welcoming community.

Snowdon (Llanberis Path — descent only)

Ride down from the summit of Wales's highest mountain. Bucket-list stuff.

You can ride a mountain bike to the summit of Snowdon (on permitted paths, outside restricted hours) and descend the Llanberis Path. The upper sections are rocky and technical, the middle sections are fast and flowing, and the whole thing comes with views that no trail centre can match. It's an adventure ride rather than a trail centre run — proper mountain biking in the original sense.

Coed Llandegla (just outside Snowdonia)

The best all-round trail centre in North Wales for families and mixed-ability groups.

Technically just outside the national park boundary, Coed Llandegla is included because it's where most North Wales mountain bikers start their journey. The trail centre has genuinely excellent facilities — café, bike hire, skills area, shop — and trails graded from green (absolute beginner) through to black (expert). The red trail is one of the best intermediate loops in Wales: flowing berms, table-tops, and natural features in a beautiful forest setting.

Mawddach Trail (Barmouth to Dolgellau)

Not mountain biking — but the most beautiful bike ride in Wales. Perfect for families.

Strictly speaking, the Mawddach Trail is a flat, traffic-free cycle path along a disused railway line, not a mountain bike trail. But it's so beautiful and so popular that it deserves mention. The 15km route follows the Mawddach Estuary from Barmouth to Dolgellau, crossing the famous Barmouth Bridge, with Cadair Idris as a backdrop. It's the ride that gets families onto bikes in Snowdonia. Any bike will do — you don't need a mountain bike.