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North Wales
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Corris

Top 20 Natural Monuments around Corris

Best natural monuments around Corris are situated within the Dyfi Forest in Southern Snowdonia, Wales. This region features a diverse landscape of ancient woodlands, prominent mountains, and serene lakes. Corris offers opportunities to explore its geological and ecological heritage through various natural sites. The area is known for its significant natural beauty and varied terrain, making it ideal for walking routes and popular hiking trails.

Best natural monuments around Corris

  • The most popular natural monument is Penygadair summit, Cadair Idris

Last updated: July 1, 2026

Penygadair summit, Cadair Idris

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Complex and striking, Cadair Idris is the Yr Wyddfa (Snowdon) of southern Eryri (Snowdonia): a honeypot mountain renowned for its imperious cliffs, enticing ridges and pretty tarns. It is a …

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Summit of Aran Fawddwy

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An often-ignored, almost secret mountain, Aran Fawddwy is the UK’s highest mountain south of Snowdon. Rising high above the shattered crags plummeting into Creiglyn Dyfi tarn, Aran Fawddwy forms a …

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Llyn Cau

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Llyn Cau has an ambience all of its own. This is a beautiful high mountain pool watched over by the frowning cliffs of Craig Cwm Amarch and Penygadair, Cadair Idris' …

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Llyn Cynwch

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Llyn Cynwch acts as both a 'prequel' and 'sequel' to the Precipice Walk, one of the most famous and popular walks in the area with breathtaking views. You'll get a …

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Cregennan Lakes

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These twin lakes are particularly beautiful and lie just north of Cadair Idris. Both are owned by the National Trust and are free to visit. With mountains rising around them …

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Lôn Las Cymru through Wales (NCR 8) – Ride from Holyhead to Cardiff

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Lôn Las Cymru through Wales (NCR 8) – Ride from Holyhead to Cardiff

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Tips from the Community

Dominiek Van Dooren
May 11, 2026, Penygadair Summit, Cadair Idris

According to legend, Cader is named after a giant called Idris Gawr. 'Cadair Idris' means 'Chair of Idris' in English, while 'Cader' can also refer to an ancient fortress. The place is known as Cader Idris rather than Cadair, but both names are used. The most famous local fable is that if you spend the night on the mountain, you will go mad or become a poet. (Visit Wales)

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It is worth the effort. At the top, you enjoy a beautiful view in all directions. It cannot be captured in photos.

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Clive G
October 10, 2025, Aran Fawddwy Summit

A very fine mountain that benefits from being a bit off the beaten track, so you are unlikley to see many other people up here. The cliffs on the easten side areabout a thousand feet high.

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Annja
August 31, 2025, Cregennan Lakes

First, a somewhat adventurous ride on the single track to the parking lot, which costs £5. The easy loop around the lake is very beautiful and relaxing – the sheep roam freely, but they keep their distance. Dogs must be on a leash, of course, but that's not a problem. Enjoy it – and if you're up for more, go for a longer loop. There are a few tables and benches above the parking lot for your picnic. You won't find any litter baskets, so you'll have to take them with you – which is perfectly fine, as it's a nature reserve. Highly recommended.

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The battered trig point on Aran Fawddwy is built of blocks rather then being a concrete lump, and it's exposed and airy position does mean it is on the receiving end of a lot of weather.

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Zoe Evans
November 17, 2023, Llyn Cynwch

A circular walk through the historical Nannau estate and along the shore of Llyn Cynwch The Precipice has a fantastic array of qualities. From habitats such as woodlands and meadows to captivating views of Snowdonia’s mountain ranges. The path will take you through part of the Nannau estate which dates back to the 12th century and is steeped in fascinating Welsh history. The route ends on the shores of Llyn Cynwch—a working reservoir that provides nearby Dolgellau with water.

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Dominiek Van Dooren
September 23, 2023, Llyn Cynwch

Llyn Cynwch acts as both a 'prequel' and 'sequel' to the Precipice Walk, one of the most famous and popular walks in the area with breathtaking views. You'll get a glimpse of the lake if you take the route counterclockwise and you'll see it in all its glory if you finish the walk with a nice, steady stroll along the banks. Together with the Precipice Walk it is part of the historic Nannau estate and is a working water basin that has supplied drinking water for Dolgellau since 1968. Because it is a water basin, swimming is not allowed. (DOLGELLAU.uk)

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51m
September 6, 2023, Aran Fawddwy Summit

The rocky and remote summit of Aran Fawddwy stands at 905 m. It's the only peak in Wales outside the northern Snowdonia range over 900 m. It's a tough run to the summit where ever you start from but the views are great and the descent via Hengwm is awesome!

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Frequently Asked Questions

What kind of natural features can I expect to see around Corris?

The Corris area, nestled within the Dyfi Forest, offers a diverse range of natural features. You'll find majestic mountains like Cadair Idris and Aran Fawddwy, serene lakes such as Llyn Cau, Llyn Cynwch, and Cregennan Lakes, ancient broadleaved woodlands like the Aber Corris Nature Reserve, and even hidden waterfalls within old slate quarries.

Are there family-friendly natural monuments or activities near Corris?

Yes, there are options suitable for families. The Cregennan Lakes are noted as family-friendly and offer accessible parking. While some mountain trails can be challenging, easier walks can be found within the Dyfi Forest. The Aber Corris Nature Reserve also offers woodland trails, though some sections can be steep.

What are some popular hiking trails near the natural monuments around Corris?

The region offers numerous hiking opportunities. For challenging walks, the ascent to Penygadair summit, Cadair Idris, is very popular, offering striking views. You can also find easy hikes, such as the 'Corris – Idris Stores loop from Corris Uchaf' or 'Tal-y-llyn Lake loop from Dolffanog Fawr'. For more options, explore the hiking routes around Corris.

Can I go wild swimming in the lakes around Corris?

While some mountain lakes like Llyn Cau on Cadair Idris are mentioned as places where you can swim, it's noted that you need a 'cast-iron constitution' due to the cold water. However, swimming is explicitly not allowed in Llyn Cynwch as it is a working water basin supplying drinking water.

What wildlife can I observe in the natural monuments around Corris?

The Aber Corris Nature Reserve is a vital wildlife corridor within the Corris valley, offering a chance to see a variety of flora and fauna in its ancient broadleaved woodland. The Afon Deri, which runs through the reserve, is also a spawning ground for salmon. The broader Dyfi Forest and mountain areas are home to diverse birdlife and other native species.

Are there any natural monuments suitable for beginners or those looking for easier walks?

For easier exploration, the Cregennan Lakes offer accessible paths and beautiful scenery. The Aber Corris Nature Reserve has public footpaths, though some sections can be steep. For specific easy hiking routes, you can check out easy hikes around Corris.

What is the best time of year to visit the natural monuments in Corris?

The region's natural beauty can be enjoyed year-round, but each season offers a different experience. Spring and summer provide lush greenery and warmer temperatures ideal for hiking. Autumn brings vibrant foliage to the woodlands. Winter walks can be stunning, especially in the mountains, but require appropriate gear and caution due to potentially harsh conditions.

Are the natural monuments around Corris dog-friendly?

Many outdoor areas in the Dyfi Forest and around the natural monuments are dog-friendly. However, when visiting sensitive areas like the Aber Corris Nature Reserve, it's important to keep dogs on leads, especially near the river where salmon spawn, to protect wildlife and ensure safety on steep paths.

What are some of the more challenging natural monuments or hikes in the area?

For a challenging experience, the ascent to Penygadair summit, Cadair Idris, is a demanding but rewarding hike with complex and striking views. Another significant challenge is the Summit of Aran Fawddwy, which is the UK’s highest mountain south of Snowdon, offering expansive views across Snowdonia from its rocky and remote peak.

Are there opportunities for cycling or mountain biking near Corris's natural monuments?

Yes, the expansive Dyfi Forest surrounding Corris is well-known for its cycling opportunities. You can find various routes for gravel biking, including challenging options like the 'Nant y Moch loop' or the 'Mach 1, 2, and 3 Loop'. For more details, refer to the gravel biking guide around Corris.

What makes Cadair Idris a significant natural monument?

Cadair Idris, meaning 'Chair of Idris', is a prominent mountain renowned for its imposing cliffs, enticing ridges, and scenic tarns like Llyn Cau. It's steeped in Welsh legend, adding a mythical ambiance to its already stunning natural beauty. The Penygadair summit offers complex and striking views, making it a popular destination for challenging walks.

Where can I find information about the Aber Corris Nature Reserve?

The Aber Corris Nature Reserve is a three-acre woodland site on the steep east bank of Afon Deri, known for its ancient broadleaved woodland and as a vital wildlife corridor. You can find more information about this significant natural area on external tourism sites like Visit Wales or Visit Mid Wales.

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Extend your search for the best caves by checking out these guides of the top ones around Corris:

LlandygaiLlanddeiniolenLlanllechidBethesdaWaunfawrBeddgelertLlanberisSnowdoniaBetws GarmonAberLlanrugLlanllyfniLlandwrogPentirFfestiniogLlanfrothenDolbenmaenLlanwndaMaentwrogBontnewyddPenrhyndeudraethPorthmadogDolgellauTalsarnauGanllwydClynnogLlanelltydBrithdir And LlanfachrethMawddwyArthogBarmouthLlanfihangel-Y-PennantLlanegrynTrawsfynyddCaernarfonLlanuwchllynDyffryn ArdudwyBryn-CrugBangorLlanystumdwyLlangywerPennalLlangelyninLlanbedrLlanfairLlŷn AONB (AHNE Llŷn)Y FelinheliBuanLlannorHarlechLlandderfelLlanaelhaearnLlanycilCricciethTudweiliogBotwnnogAberdoveyTywynPistyllNefynPwllheliAberdaronLlanbedrogBalaLlanengan

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