Pen Y Fan - A Trip Up The Mountain
Feb 23, 2026
There are a number of local walks that I enjoy taking from Gellihaf House. I have explored our local area by foot in many directions and have come across many hidden gems. One of these is the route over the viaduct, always a favourite and one that I tend to do when family and friends stay. It’s about 6km long and you’ll need a pair of sturdy shoes/ boots especially if it’s been raining (which it often does in Wales).
Start at Summerfield Hall Lane, just a few steps away from Gellihaf House. Meander along through the hedge
lanes until you get to the bridge. Turn left up the grassy path and follow it along until you reach the main road.
There is a footpath which is actually route number 47 of the national cycle network. To continue on the walk you need to turn right onto it and keep following the woodland path until you stumble across the locally named ‘Stargate’ or wheel of drams is a fairly recent addition by sculpture Andy Hazell, an unusual piece of modern art formed from a circle of coal mining dram trucks to commemorate the industrial heritage of this locality within the history of the South Wales Valleys.
The Maesycwmmer viaduct is an impressive stone construction, and grade II listed. It’s a real feat of engineering and a great vantage point for gazing to the north and south of the valley. You can see Gellihaf House from it too!
When you walk across the viaduct and via off to the right you’ll be close to Hengoed Station. From here it’s downhill until you’re back at the viaduct, but under it this time. You can really see the detail in the construction from this angle, and how tall it actually is! Home then, just follow the road up Summerfield Hall Lane!
Your host Catherine
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