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Llwyn-onn Reservoir

131 ha

📷 Ruth Sharville · Geograph · CC BY-SA 2.0

Plan your visit

PicnicBirdsWildlife
Public accessFree entryDogs welcome131 ha

Getting here

51.79738, -3.44056

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Visiting this summer

Seasonal nature notes and what to look for now

  • 🐦74+ species recorded in this area — summer evenings are best for activity; watch for Robin and Blackbird
  • 🧺Good picnic destination in summer — open space and facilities for a relaxed day out
  • 🐕Dogs welcome — bring water in summer; the site has enough space to find shade on hot days

Good to know

  • £Free to visit — no entry charge
  • 🐕Dogs welcome
Parking· FreePicnic spot

Best for

9 activities

Picnic day out

picnic area, car park; Reservoir — waterside day out

Free

Bird watching

Birds — Robin, Blackbird, Chaffinch +71 more · last seen 2026; Reservoir — wildfowl and wading birds

Free

Wildlife

Birds — Robin, Blackbird, Chaffinch +71 more · last seen 2026; Reservoir — wildfowl and wading birds

Free

Insect spotting

Insects — 7-spot Ladybird, Sericomyia silentis, Meliscaeva cinctella +100 more · last seen 2026

Free

Dog walks

Dogs allowed with public access

Free

Waterside walks

Reservoir — waterside public access; parking

Varies

Trails nearby

Within roughly 5 km
🚶

Walking

2 signed routes nearby

Signed route nearby
Taff TrailWalking route88 km
Named routeLength 88 kmRegional walking route
Cambrian WayWalking route
Named routeNational walking route
🚴

Cycling

27 signed routes nearby

Signed route nearby
Route 46Cycling route
Named routeRef 46National Cycle Network
Lôn Las Cymru (South)Cycling route
Named routeRef 8National Cycle Network
Main RouteCycling route350 m
Named routeRef 8Length 350 mNational Cycle NetworkTraffic-freeSurface asphalt
Main RouteCycling route171 m
Named routeRef 8Length 171 mNational Cycle NetworkTraffic-freeSurface asphalt
Main RouteCycling route215 m
Named routeRef 8Length 215 mNational Cycle NetworkOn-roadSurface asphalt
Main RouteCycling route211 m
Named routeRef 8Length 211 mNational Cycle NetworkTraffic-freeSurface asphalt
🐴

Horse riding

6 public paths nearby

Public paths

No named routes yet. Public paths are shown on the map.

Wildlife to spot

Photos

Ice on the margins of Llwyn-onn reservoir

📷 Ruth Sharville · Geograph · CC BY-SA 2.0

Ice on the margins of Llwyn-onn reservoir

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Weather for this location

Next 14 days

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Nearby places

Useful places within 5 km

🦉CWM TAF FECHAN WOODLANDSNature reserve4.4 km→💧Llwyn-onn ReservoirReservoir0 m→🌱Forest Holidays Garwnant, Brecon BeaconsUrban park2.2 km→🪦Nant Ddu CemeteryCemetery2.8 km→⛪St Gwynno ChurchReligious grounds4.4 km→⛪St John's ChurchReligious grounds4.6 km→