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View of Bryn Oer Tramroad – Cwm Callan Roman Road Trail loop from Nant-y-Bwch

Routes

Mountain biking trails

View of Bryn Oer Tramroad – Cwm Callan Roman Road Trail loop from Nant-y-Bwch

Hard

4.0

(2)

riders

View of Bryn Oer Tramroad – Cwm Callan Roman Road Trail loop from Nant-y-Bwch

03:29

40.2km

590m

Mountain biking

Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike. The starting point of the route is accessible with public transport.

Last updated: February 28, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Bannau Brycheiniog National Park

Waypoints

Start point

Bus stop

Get Directions

9.09 km

View of Bryn Oer Tramroad

Highlight • Viewpoint

If climbing this is the end of the steep section, if descending this is the start of a blue/red rocky descent. Insane views from high up

MTB or brave graveller only

Tip by

9.13 km

Cwm Callan Roman Road Trail

Highlight (Segment) • Viewpoint

An old Roman Road which lends itself magnificently to fun on two wheels. Wide open, with fabulous views, before darting into woodland as it reaches the reservoir.

Tip by

15.5 km

Torpantau Train and View of Pentwyn Reservoir

Highlight • Viewpoint

You can view the Torpantau train as it meanders along the mountain below you or stops to pick up passengers. I also recommend looking back at this elevation for a stunning view of the Pentwyn Reservoir.

Tip by

17.8 km

The Gap Trail Fork

Highlight • Viewpoint

Take the left fork to avoid the massive gully and replace it with an easy ramp. It also doesn't get as techy as that initial section until later on

Tip by

18.9 km

Start of The Gap Trail, Bannau Brycheiniog National Park

Highlight • Trail

Steady rocky climb

Tip by

21.4 km

The Gap (Bannau Brycheiniog National Park)

Highlight • Mountain Pass

Lying in the saddle between Pen y Fan and Fan y Big, the Gap has long been a focal point for mountain biking in the Brecons.

Best ridden from south …

Tip by

40.2 km

End point

Bus stop

Way Types & Surfaces

Way Types

24.4 km

10.5 km

5.07 km

309 m

Surfaces

16.8 km

8.26 km

8.07 km

5.51 km

1.46 km

< 100 m

Elevation

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

Weather

Sunday 17 May

11°C

4°C

79 %

Additional weather tips

Max wind speed: 19.0 km/h

to get more detailed weather forecasts along your route

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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View of Bryn Oer Tramroad – Cwm Callan Roman Road Trail loop from Nant-y-Bwch

View of Bryn Oer Tramroad

Cwm Callan Roman Road Trail

Torpantau Train and View of Pentwyn Reservoir

The Gap Trail Fork

Start of The Gap Trail, Bannau Brycheiniog National Park

The Gap (Bannau Brycheiniog National Park)

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