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Bwlch y Groes (Hellfire Pass) – Bwlch y Groes loop from Dinas Mawddwy

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Bike touring routes & trails

Bwlch y Groes (Hellfire Pass) – Bwlch y Groes loop from Dinas Mawddwy

Hard

riders

Bwlch y Groes (Hellfire Pass) – Bwlch y Groes loop from Dinas Mawddwy

01:45

23.2km

560m

Cycling

Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: May 14, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc Cenedlaethol Eryri

Waypoints

Start point

Parking

Get Directions

9.20 km

Bwlch y Groes (Hellfire Pass)

Highlight (Segment) • Mountain Pass

Tough road climb, not for the faint hearted! The official top 100 climbs finishes just left of the fork or turn right and descend to the lake.

Tip by

11.1 km

View of the Valley at the Wooden Cross

Highlight • Viewpoint

11.8 km

View of the Valley from Bwlch y Groes

Highlight • Mountain Pass

The climb up to Bwlch-y-Groes from Llanymawddwy is a tough one. It is about 3.4 km long and has about 387 m of vertical ascent to get to the gap …

Tip by

11.8 km

Bwlch y Groes

Highlight (Segment) • Mountain Pass

The second highest public road mountain pass in Wales this is definitely one to tick off the cycling bucket list. It is narrow and winding so it is recommended to …

Tip by

23.2 km

End point

Parking

Way Types & Surfaces

Way Types

23.0 km

105 m

< 100 m

Surfaces

23.0 km

105 m

< 100 m

Elevation

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

Weather

Sunday 12 July

24°C

12°C

0 %

Additional weather tips

Max wind speed: 23.0 km/h

to get more detailed weather forecasts along your route

Comments

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Bwlch y Groes (Hellfire Pass) – Bwlch y Groes loop from Dinas Mawddwy

Bwlch y Groes (Hellfire Pass)

View of the Valley at the Wooden Cross

View of the Valley from Bwlch y Groes

Bwlch y Groes

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