Mountain Bike Trails at Llys-y-Frân Lake - Free to Enter

Mountain Bike

Trails

at Llys-y-frân Lake

Brought to you by Welsh Water

Walking Path & Bike Trail Closures

For six weeks from 19 January to 6 March 2026, the walking routes and bike trails on the western side of the lake are closed for essential works including the removal and replacement of the footbridge in Velindre Wood.

The following bike trails are affected:

Reservoir Route
Woodstock Route
Family Route

The following mountain bike trails are affected:

Woodstock Weave
Dam Good View
Bluebell Woods
Fern Gulley
The Otter Spotter
Kingfisher Canyon
Peregrine Pass
The Dam Buster
Rocky Road

This project, which is supported by the National Lottery Heritage Lottery Fund through the The Woodland Investment Grant (TWIG), has been initiated in response to customer feedback.

Thank you for your patience as we continue to improve Llys-y-frân.

Mountain Bike Trails at Llys-y-frân Lake

Our mountain bike trails branch off and re-join the main Reservoir Route.

Please follow all mountain bike trails in an anti-clockwise direction.

In total, there are 2.4km (1.5 miles) of additional trails for mountain biking that range in difficulty from green/easy to black/severe.

They’ve been designed to help you develop and challenge your ability and confidence. The sections are well sign-posted and colour coded so choose an adventure based on your appropriate skill level.

Green Trails (Easy)

Beginner trail where all features (jumps, drops, rocks etc) are pretty much suitable for anyone that can ride a bike.

Blue Trails (Moderate)

A route which is physically demanding in parts. Contains climbs which are strenuous but relatively short lived. A good standard of fitness is required. High level routes which may often be exposed to the elements.

Red Trails (Difficult)

A physically demanding route. Long & sustained climbs throughout. High level routes which may often be exposed to the elements. A high standard of fitness is essential.

Black Trails (Severe)

An extremely demanding route. You will need a quality bike for these trails and some expert skills. Expect steep downhills, varying terrain unavoidable drops, rock rolls and gap jumps.

Llys-y-frân Bike Trails

Grebe Glen

Drop waterside for rolling ups and downs of sinewy single track with an optional blue grade rock section.

Route Length: 300m

Duck, Duck, Goose

Start your adventure riding berms and roller features similar to the skills area on this mini flow trail.

Route Length: 300m

Woodstock Weave

A slow gentle ascent through dense old woodland before a long rolling descent in and out of majestic trees to join main track.

Route Length: 750m

Dam Good View

Cut into part of an old hedgerow track dropping down over a bridge and stream inlet. Then climb back up to the top of the forest across a north shore bridge to reach the highest point on the site and well-earned views of the dam and Syfynwy Valley. Links straight into The Dam Buster.

Route Length: 750m

Bluebell Woods

Flow between some of the grandest trees on-site and open bracken Peddly section flowing in and out of open bracken areas with rollable jumps and into thick old growth with some of the grandest trees on site. Springtime carpet of bluebells.

Route Length: 550m

Badger’s Bank

Take a meandering climb to the top of the quarry wall with an optional red grade boulder feature before a fun descent flowing in and out of the trees.

Route Length: 1000m

Fern Gulley

Climb up through dappled light in a fern-rich woodland that opens out and rolls through deep bracken with fantastic views of the lake.

Route Length: 225m

The Otter Spotter

Drop lake-side onto flowy single-track weaving through woodland before flattening out and into the final descent to the reservoir. Look out for otters, kingfishers and spring-time bulbs in this special conservation area.

Route Length: 750m

Kingfisher Canyon

From lofty heights, ride the technical descent of steep, dropping turns and berms to the shady depths of the valley below and north shore bridge crossing two streams. Then it’s a deceptive ascent up the valley side before giving way to a fast descent past more rocky outcrops and moss-laden trees.

Route Length: 1000m

Peregrine Pass

Like a twisted ribbon of dirt, the trail flows across the field through rollers, jumps and berms into fast, twisty woodland single-track. Cross a north shore bridge over a ravine and tackle a small drop off to launch into the final trail descent.

Route Length: 400m

The Dam Buster

It’s the fast and flowy final descent with rollers, jumps and big berms moving into tight woodland turns, exposed rock sections, roots and drops before finishing near the dam wall.

Route Length: 1000m

Rocky Road

A technical rocky ascent to the top of the cliff line with fantastic views over the reservoir. Up in the treetops traverse past rocky outcrops to descend through natural rock chutes, drops and optional black features flowing through old growth woodland.

Route Length: 900m

Share with Care

Walkers and cyclists share these trails, so please treat each other with respect and consideration.

Although walkers have priority, please do let cyclists pass safely. All cyclists to ride the routes anticlockwise.

•      Keep left, pass right

•     Be seen, be heard, be safe

•      Use lights it it’s dark or overcast

•      Pass safely and slowly

•      Walkers have priority

•      Ride at a sensible speed

•      Slow down near blind spots

•      Use bins, or take litter home

Other routes you might like

The Family Cycling Route

3.19m / 5.13km. Soak in the stunning surroundings of the forest and the spectacular views of the water as you cycle along the Family Route.

• GO TO ROUTE •

The Reservoir Cycling Route

6.27m / 10.1km. Enjoy an exciting bike ride and head through trees as you take in the lovely sights of the woodland.

• GO TO ROUTE •

Velindre Family Walking Trail

3.4m / 5.4km. Take in the stunning surroundings of the forest and the spectacular views of the water as you enjoy this walk in just under 3 hours.

• GO TO ROUTE •

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OTHER WELSH WATER ADVENTURES

01437 532273

llysyfran@dwrcymru.com
Llys-y-Frân, Clarbeston Road, Pembrokeshire, SA63 4RR

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