Routes

Planner

Features

Updates

App

Get the App

Routes

Mountain biking trails

Llwyn-on Reservoir Dam – The Gap Pass loop from Libanus

Routes

Mountain biking trails

Llwyn-on Reservoir Dam – The Gap Pass loop from Libanus

Hard

4.8

(4)

riders

Llwyn-on Reservoir Dam – The Gap Pass loop from Libanus

04:08

53.9km

920m

Mountain biking

Hard mountain bike ride. Very 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: April 22, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Bannau Brycheiniog National Park

Cwm Taf Fechan Woodlands Site of Special Scientific Interest

Waypoints

Start point

Bus stop

Get Directions

18.9 km

Llwyn Onn Reservoir

Highlight • Structure

Smaller reservoir than others in the area, but with stunning landscape great off road paths to keep you away from the A470

Tip by

19.1 km

Llwyn-on Reservoir Dam

Highlight • Structure

Llwyn-on reservoir, built in 1926, covers 150 acres and is the largest of the three in the Taff Fawr Valleys area. Walking along the shore you can be immersed in …

Tip by

25.9 km

Pontsarn Viaduct

Viewpoint

27.2 km

Taf Trail

Highlight • Cycleway

The full route provides a fantastic mix of terrain and scenery😊

Tip by

32.3 km

Wooden Bridge in Bannau Brycheiniog Forest

Highlight • Bridge

Around a 6 mile circular peaceful easy for all accessibilities. The forest is so special gives a magical effect of walking through absolutely beautiful.

Tip by

34.0 km

Pentwyn Reservoir

Highlight • Lake

Pentwyn Reservoir is the smaller sister to Pontsticill Reservoir, both being separated by a causeway going towards the old Dolygaer outdoor centre. It is a very popular spot with fishermen …

Tip by

34.6 km

Dolygaer Activity Centre

Highlight • Cafe

Outdoor Activities and Accommodation in Wales dolygaeroutdoor.co.uk

Tip by

36.2 km

Pentwyn Reservoir

Lake

36.8 km

Taf Fechan Forest

Forest

39.8 km

Start of The Gap Trail, Bannau Brycheiniog National Park

Highlight • Trail

Steady rocky climb

Tip by

40.5 km

The Gap Pass

Highlight (Segment) • Viewpoint

This off road trail tackles one of the Brecon Beacons’ classic MTB routes; the Gap. This is the pass between Fan-y-Big and Cribyn, topping out at 600 metres above sea …

Tip by

53.9 km

End point

Bus stop

Way Types & Surfaces

Way Types

18.0 km

11.5 km

8.39 km

7.53 km

5.91 km

2.56 km

Surfaces

19.0 km

16.7 km

6.69 km

5.77 km

4.75 km

975 m

Elevation

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

Highest point (590 m)

Lowest point (200 m)

Weather

Monday 18 May

14°C

9°C

-- %

Additional weather tips

Max wind speed: -- 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.

Navigate

Send to Phone

Save

Edit route

Download GPX

Move start point

Embed on a website

Report an Issue

Nearby routes

Moderate

4.7

698

The Gap — The Brecon Beacons National Park

03:15h

35.7km

700m

Hard

4.6

520

Talybont on Usk & The Gap loop from Brecon

03:30h

39.7km

650m

Hard

4.3

179

Talgarth, Grwyne Fawr and Y Grib loop

04:39h

47.1km

1,380m

Hard

4.3

179

Black Mountains and Grwyne Fawr Loop

04:22h

42.5km

1,270m

Easy

5.0

373

Terry's Belly (blue) — Bike Park Wales

00:18h

4.35km

30m

Moderate

5.0

275

Terry's Belly (blue) and Hot Stepper (red) — Bike Park Wales

00:24h

4.21km

30m

Easy

5.0

251

Sixtapod and Willy Waver (blue) — Bike Park Wales

00:12h

3.54km

Moderate

4.3

123

Talybont & Pentwyn Reservoir loop from Talybont on Usk

02:57h

30.4km

650m

Easy

5.0

246

Melted Welly, Blue Belle and Bushwhacker (blue) — Bike Park Wales

00:13h

3.59km

Moderate

4.4

Llangorse and Bwlch Loop — The Brecon Beacons National Park

02:32h

29.2km

590m

Moderate

4.1

Pentwyn Reservoir and Talybont Reservoir loop

02:34h

27.7km

520m

Easy

4.3

159

Kermit and Badger's Run (green) — Bike Park Wales

00:18h

4.54km

20m

Llwyn-on Reservoir Dam – The Gap Pass loop from Libanus

Llwyn Onn Reservoir

Llwyn-on Reservoir Dam

Taf Trail

Wooden Bridge in Bannau Brycheiniog Forest

Pentwyn Reservoir

Dolygaer Activity Centre

Start of The Gap Trail, Bannau Brycheiniog National Park

The Gap Pass

Nearby routes

Sign up or log in to keep exploring this route

We value your privacy ⛰️

We value your privacy ⛰️