4.4
(514)
4,833
hikers
11
hikes
Hiking around Ynysddu is set within the South Wales Valleys, offering a blend of reclaimed industrial heritage and vibrant natural beauty. The region is characterized by prominent hills such as Mynydd Machen and Twmbarlwm, alongside extensive woodlands like Cwmcarn Forest. Many routes follow the River Sirhowy through the valley or climb to viewpoints offering panoramic views over the surrounding area. This diverse terrain provides options for various abilities and interests.
Last updated: June 25, 2026
5.0
(1)
26
hikers
13.4km
03:32
120m
120m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
5.0
(4)
26
hikers
7.09km
01:58
120m
120m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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4.5
(2)
12
hikers
7.34km
02:17
270m
270m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
5.0
(1)
12
hikers
6.09km
01:43
120m
120m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
5.0
(1)
11
hikers
11.1km
03:17
310m
310m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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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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0
Some gates are pain to get the bike through loud easy turn handapbares lift front wheel
0
0
Great panoramic views of surrounding area.
0
0
plenty of free parking in Machen next to the village hall and library
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Mynydd Machen is a 1,188-foot (362 m) hill in South Wales which affords glorious views over Newport, Cardiff, Steep Holm, Flat Holm, Brean Down, and the Severn Estuary. The summit is marked by the rock 10 feet (3 m) northwest of the trig point.
2
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Mynydd Machen is a 362-metre-high (1,188 ft) hill lying between the town of Risca and the village of Machen in Caerphilly County Borough in South Wales. Its summit is crowned by a trig point and a mast. It is a UK listed Marilyn.
3
0
This part of the trail is a little flatter than the sections before and after. It's also fairly smooth so makes for good running even when it's wet. Great views down into the valley!
2
0
Yes, the area offers several gentle walks perfect for families. The Sirhowy Walk loop from Cwmfelinfach is an excellent choice, offering a relatively flat path through the scenic Sirhowy Valley. Another great option is a stroll around Pen-y-fan Pond, which is one of the last remaining canal feeder reservoirs in Wales and provides a safe, open space for a family ramble.
Many trails in the Ynysddu area are dog-friendly, especially in open spaces like Cwmcarn Forest and the Sirhowy Valley Country Park. However, you may encounter livestock on routes that cross farmland, so it's important to keep your dog on a lead in these areas. Always check for local signage regarding dogs.
Absolutely. Most of the popular trails around Ynysddu are designed as loops, so you can start and finish in the same place. For a longer, more varied circular route, consider the Forest Pond and Path View loop from Crosskeys, which takes you through the beautiful Cwmcarn Forest.
Cwmcarn Forest has dedicated visitor parking near the main trailhead and visitor centre. The Cwmcarn Forest Drive also offers eight stop-off points with parking, providing access to different trails. For walks in the Sirhowy Valley, you can find parking at the Sirhowy Valley Country Park and near access points in towns like Cwmfelinfach.
The trails offer a lot of variety. You'll find everything from paved canal towpaths and gentle forest tracks to steeper, uneven paths on the ascents to hills like Mynydd Machen. After rain, some of the woodland and moorland paths can become muddy, so waterproof hiking boots are recommended.
Yes, the landscape is rich with history. The Crumlin Arm Canal – Cwmcarn Trailhead Arch loop from Crosskeys combines a walk along a historic canal with forest trails. Additionally, a hike up Mynydd y Grug takes you to a summit that was once a spoil tip, offering a direct link to the region's mining past.
The region offers fantastic panoramic views. Hikes that climb to the summits of Mynydd Machen or Mynydd y Grug reward you with sweeping vistas across the South Wales Valleys. Even lower-level walks, such as those in Cwmcarn Forest, provide beautiful scenic viewpoints overlooking the wooded slopes and reservoirs.
Yes, several trailheads are accessible via public transport. Towns like Risca and Crosskeys have train stations and are starting points for popular hikes, including routes into Cwmcarn Forest and up Mynydd Machen. Local bus services also connect the villages throughout the valleys, getting you closer to various footpaths.
There is a good mix of difficulties. You can find over 150 easy-rated walks that are mostly flat and suitable for all skill levels. For those seeking more of a challenge, there are over 200 moderate routes that typically involve significant elevation gain, such as the Mynydd Machen Summit loop from Risca.
The trails around Ynysddu are highly regarded by the komoot community. Reviewers often praise the mix of peaceful forest paths, the sense of history in the landscape, and the rewarding panoramic views from the hilltops. The well-maintained paths in Cwmcarn Forest are also a frequently mentioned highlight.
Yes, the area is a hub for various outdoor pursuits. Cwmcarn Forest is famous for its mountain biking trails. The region is also on the Celtic Trail cycle route (National Cycle Route 47). For more adventure, the Ynys Hywel Activity Centre in the Sirhowy Valley offers activities like rock climbing and canoeing.
While most trails are through natural landscapes, many routes start or finish in villages like Risca, Crosskeys, or Cwmfelinfach, where you can find traditional pubs and cafes for refreshments after your hike. It's best to plan your food and drink stops for before or after your walk.


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