Mountain peaks around Crosskeys offer a diverse landscape of hills, valleys, and historical landmarks within the Caerphilly county borough of Wales. This region features numerous summits that provide expansive views and opportunities for outdoor activities. The area is characterized by its natural beauty, historical significance, and recreational appeal for visitors.
Last updated: June 29, 2026
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Nice ascent from Crosskeys, but watch out for very overgrown pathways on the Machen side. Great views from the top!
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Twmbarlwm is a prominent hill and archaeological site located near the town of Cwmcarn in South Wales. It is part of the Caerphilly County Borough and is known for both its natural beauty and historical significance. Here are some key points about Twmbarlwm: Key Features: Hillfort: Twmbarlwm is home to the remains of an ancient hillfort, dating back to the Iron Age. The fortifications, which include earthworks and ramparts, suggest it was a significant settlement during that period. Celtic Connections: The name "Twmbarlwm" is thought to derive from Welsh, with "Twm" being a diminutive of "Tudur" and "barlwm" referring to a mound or hill. The site is associated with Celtic history and mythology. Natural Beauty: The hill offers stunning views of the surrounding landscape, including the nearby valleys and mountains. It is a popular destination for walkers, hikers, and outdoor enthusiasts. Archaeological Significance: Twmbarlwm has been the subject of various archaeological studies, which have revealed insights into ancient settlement patterns, defensive strategies, and daily life in prehistoric Wales. Access: The hill is accessible via footpaths, making it a popular spot for local residents and visitors. There are several trails that lead to the summit, offering a rewarding hike. Cultural Heritage: The site is connected to local folklore and legends, contributing to its cultural significance in the region. Visiting: If you plan to visit Twmbarlwm, it’s a good idea to check local resources or hiking guides for specific trails and information about the area. The site is a great way to experience the natural beauty and historical richness of South Wales.
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A small summit above Risca. Known locally as the "Twmp" (the hump), the pimple or the nipple, due to the shape of the mound on the summit.
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Caerphilly Mountain is located in the Vale of Glamorgan in Caerphilly and stands at 271 m above sea level. There are some magnificent panoramic views on offer here across Cardiff and Caerphilly, Feet, and on a sunny day, even over to Flat Home and Steep Home Islands, a pair of welsh islands lying in the Bristol Channel.
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The earliest evidence of settlement at Ruperra is from between around 700 BC and 100 AD, when an Iron Age Hill Fort was constructed along the ridge of Coed Craig Ruperra. The splendid panoramic views from the top of the ridge would have given the site a strategically strong position. Defensive banks and ditches are still visible around the area of the mound, and continuing work on the site will reveal these more clearly. This hill fort lies within what would have been the tribal territory of a people the Romans called the Silures, who were a fiercely independent nation inhabiting the vale of Glamorgan, Gwent and the valleys
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Lovely place to visit you can walk up to the top where there’s a grassy platform. Great views across the forest and out to the sea. Definitely worth a visit
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Cracking local walk, gain height for amazing views and walk over to twmbarlwm
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The Crosskeys area offers several popular peaks. Twmbarlwm Hill and Iron Age hillfort is a significant historical site at 419 meters, offering wonderful views of the Severn Estuary. Another must-see is Mynydd Machen Summit, which stands at 362 meters and provides impressive views over Newport, Cardiff, and the Severn Estuary. Caerphilly Mountain Summit is also highly regarded for its panoramic views across Cardiff and Caerphilly.
Yes, the region is rich in history. Twmbarlwm Hill is home to a prominent Iron Age hillfort at its summit, offering a glimpse into ancient history. Additionally, Coed Craig Ruperra Hill Fort features defensive banks and ditches from an Iron Age settlement, providing historical context along with great views.
The peaks around Crosskeys offer expansive and diverse views. From Twmbarlwm Hill, you can see the Severn Estuary. Mynydd Machen Summit provides panoramic vistas over Newport, Cardiff, the Severn Estuary, and various islands. Caerphilly Mountain Summit offers clear views across Cardiff and Caerphilly, and on a clear day, even to Flat Holm and Steep Holm Islands.
While specific 'family-friendly' categories aren't listed for all peaks, many trails in the area, especially those leading to viewpoints, can be enjoyed by families. Sirhowy Valley Country Park, easily accessible from Crosskeys, offers a base for walking and cycling with access to Flatwoods Meadows Local Nature Reserve, which can be suitable for families. Always check the specific trail difficulty before heading out with children.
The peaks and trails around Crosskeys offer a range of difficulty levels. Highlights like Twmbarlwm Hill, Mynydd Machen Summit, and Caerphilly Mountain Summit are generally considered intermediate. Some routes, particularly those in Cwmcarn Forest, can be more challenging, especially for mountain biking. It's advisable to check individual route descriptions for specific difficulty grades.
Beyond hiking, the Crosskeys area is excellent for cycling and running. Cwmcarn Forest Drive, close to Crosskeys, features extensive mountain biking trails, including red-graded singletrack and downhill tracks. For general cycling, you can explore routes like the 'Muddy Forest Trail' or 'Crumlin Arm Canal' loops. Running trails include the 'Gelligroes Mill loop' and routes around Twmbarlwm. You can find more details on these activities in the Cycling around Crosskeys and Running Trails around Crosskeys guides.
While specific public transport details for each peak are not always available, the village of Crosskeys itself is accessible. For Mynydd Machen Summit, there is plenty of free parking available in Machen next to the village hall and library. Caerphilly Mountain Summit also has a large car park nearby. It's recommended to check local transport options and parking availability for your specific starting point.
The peaks around Crosskeys can be enjoyed year-round, but spring and autumn often offer the most pleasant conditions for hiking with milder temperatures and beautiful scenery. Summer provides longer daylight hours, while winter hikes can be rewarding, though some trails may be muddy or require more appropriate gear. Always check local weather forecasts before your visit.
Yes, there are options for refreshments. Near Caerphilly Mountain Summit, there is a cafe and a large car park, making it a convenient spot. Cwmcarn Forest Drive, a popular outdoor hub near Crosskeys, also has facilities including a cafe. For broader options, the village of Crosskeys and nearby towns will have pubs and cafes.
Many outdoor areas in Wales are dog-friendly, and trails around Crosskeys' peaks are generally accessible for dogs. However, it's always best to keep dogs on a lead, especially near livestock or in nature reserves, and to follow the Countryside Code. Always carry waste bags and ensure your dog is well-behaved around other hikers and wildlife.
Mynydd Twyn-glas is a sprawling 472-meter-high mountain that offers amazing views from its summit. It's known for its rolling plateau and steep slopes, many of which are covered with conifer plantations. It's a popular spot for a cracking local walk, allowing you to gain height for expansive vistas.
Yes, many of the trails in the Crosskeys area can be combined into circular walks. For example, there are routes that incorporate Twmbarlwm Hill into a loop from Risca. Exploring the network of paths in areas like Cwmcarn Forest and Sirhowy Valley Country Park also allows for creating various circular routes suitable for different distances and difficulties.


See even more amazing summits around Crosskeys with these guides: