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Mountain biking trails

View of Llyn Trawsfynydd – Serpent's Tail Trail loop from Maentwrog

Mountain biking trails

View of Llyn Trawsfynydd – Serpent's Tail Trail loop from Maentwrog

Moderate

4.0

(1)

12

riders

View of Llyn Trawsfynydd – Serpent's Tail Trail loop from Maentwrog

02:27

31.0km

460m

Mountain biking

Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary. The starting point of the route is right next to a parking lot.

Last updated: August 21, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Parc Cenedlaethol Eryri

Waypoints

A

Start point

Parking

120 m

Coed Caersaeson

Forest

2

518 m

View of Llyn Trawsfynydd

Highlight • Viewpoint

Beautiful views across the lake and the mountains beyond. Originally a reservoir built for the nuclear power station nearby.

Tip by

3

10.6 km

Sarn Helen past Craig y Penmaen

Highlight (Segment) • Cycleway

A fantastic rocky track that forms part of the ancient Sarn Helen. If you're riding the Traws Eryri bikepacking route (komoot.com/collection/2299516/bikepacking-snowdonia-from-machynlleth-to-conwy-traws-eryri), this is one of the most technical parts, and …

Tip by

4

13.5 km

Brutus

Highlight • Other

5

13.7 km

Cain Section, The Beast (Black), Coed y Brenin

Highlight (Segment) • Forest

A tricky rocky section of The Beast, a black-rated trail at Coed Y Brenin. Turn off the fire road onto the jagged rocks, climbing to start before the tight corners …

Tip by

6

14.3 km

Adam and Eve

Highlight • Natural Monument

7

14.9 km

Serpent's Tail Trail

Highlight (Segment) • Trail

Tight n' twisty, like a serpent's tail! Look out for the direct bunny hop log option on the third corner from the top. Awesome fun!

Tip by

8

28.4 km

Singletrack Trail in Parc Cenedlaethol Eryri

Highlight (Segment) • Trail

A bit muddy after rain but never too bad. Avoids the main road, well signposted.

Tip by

B

31.0 km

End point

Parking

Way Types & Surfaces

Way Types

14.6 km

8.36 km

3.67 km

2.25 km

1.27 km

890 m

Surfaces

9.47 km

8.47 km

6.57 km

5.26 km

799 m

501 m

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Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (350 m)

Lowest point (190 m)

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Weather

Powered by Foreca

Thursday 8 October

16°C

10°C

94 %

Additional weather tips

Max wind speed: 31.0 km/h

to get more detailed weather forecasts along your route

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