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Llwyn-Onn Reservoir Walk

This 3.4k circular, shore-lined, walk lets you immerse yourself in the fresh smells of the conifer forest and lapping sounds of the deep blue water.

Llwyn Onn Reservoir, built in 1926, covers 150 acres and is the largest of the three in the Taff Fawr Valleys area.

 

The abundance of fresh clean water provides an ideal habitat for otters, great crested grebes, goldeneye, goosander and coot.

 

It’s a firm favourite with anglers.  Permits can be purchased at the nearby Garwnant Visitor Centre along with tea and cake.

 

Images courtesy of John Dixon and Nigel Forster.

Brochures

Information

 

We hope you enjoy the Llwyn-Onn Reservoir Walk by whatever means you've chosen, but please travel responsibly. Take care of yourself, your surroundings and each other. Download your information leaflets below.

Mental Wellness and Hiking

Enjoy Nature Responsibly

Hiking Safely

Mental Wellness and Hiking

Enjoy Nature Responsibly

Hiking Safely

Fishing The Reservoirs Of Wales

Fishing The Reservoirs Of Wales

Maps - choose and download your map today

To find out more about the trails please download the map below:

Llwyn-Onn Reservoir Circuit

Llwyn-Onn Reservoir Circuit

If you're travelling through Merthyr Tydfil on the Taff Trail (South to North), then why not download the latest directions map to help you on your way.

Links

Alongside Treasuring our Trails we have a responsibility to ensure we, as custodians, maintain them for generations to come. Please respect the countryside and each other.
 

You can find more information and guidance by following the links below:

Countryside Code

Sustrans Cycle Route Network

Ramblers Cymru

Countryside Code

Sustrans Cycle Route Network

Ramblers Cymru

Llwyn-Onn Reservoir Walk is just one of a series of trails running right through the county borough that encapsulates the area's history complemented by miles and miles of natural beauty. So, if you want to take time to stop at one of our amazing adventure attractions, learn about our history, shop, eat, sleep or just take a moment to savour the breathtaking scenery. Merthyr has it all.

© Merthyr Tydfil County Borough Council 2024