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Porth Yr Ogof Cave – Maen Llia Standing Stone loop from Hirwaun

Porth Yr Ogof Cave – Maen Llia Standing Stone loop from Hirwaun

Hard

riders

Porth Yr Ogof Cave – Maen Llia Standing Stone loop from Hirwaun

03:53

77.5km

1,160m

Road cycling

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is accessible with public transport.

Last updated: May 10, 2026

Tips

Includes a segment in which cycling is not permitted

After 16.7 km for 105 m

Waypoints

Start point

Bus stop

Get Directions

16.7 km

Porth Yr Ogof Cave

Highlight • Cave

Porth Yr Ogof (gateway to the cave, in Welsh) boasts the largest entrance of any cave in Wales at over 55 feet (17 m) wide and almost 16 feet (5 …

Tip by

24.4 km

Maen Llia Standing Stone

Highlight • Monument

According to legend, the stone goes down to the river, the Afon Llia to drink on occasion. This tall tale seems likely to be an allusion to the fact that …

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24.8 km

Devil's Elbow Climb from Heol Senni

Highlight (Segment) • Viewpoint

The Devil’s Elbow epitomises the harsh beauty of hidden Wales. With its crumbling surface and neglected rusting barriers it weaves through beautifully rugged scenery presenting one of the toughest challenges …

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34.8 km

The International Welsh Rarebit Centre

Highlight • Restaurant

Cafe/Restaurant/Artspace - a great spot for a coffee or food.

tripadvisor.co.uk/Restaurant_Review-g3853922-d12604777-Reviews-The_International_Welsh_Rarebit_Centre-Defynnog_Brecon_Beacons_National_Park_Wa.html?m=19905

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36.5 km

Glanusk Services

Highlight • Parking

Good pit-stop and bike security with outside tables and chairs

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46.3 km

Bwlch Bryn-Rhudd

Highlight (Segment) • Mountain Pass

The early slopes are very shallow as you pass from one village to another all the way to Glyntawe where the scenery begins to open up and the routes merge. …

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64.0 km

Glynneath Hill Climb

Highlight (Segment) • Climb

This climb appears minor in the grand scheme of things, but underestimate it at your peril.

Once you’ve negotiated the junctions in Glynneath the road bends right then rears up …

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77.5 km

End point

Bus stop

Way Types & Surfaces

Way Types

44.2 km

29.8 km

2.75 km

677 m

128 m

Surfaces

73.5 km

3.70 km

314 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (440 m)

Lowest point (60 m)

Weather

Saturday 11 July

28°C

14°C

-- %

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Porth Yr Ogof Cave – Maen Llia Standing Stone loop from Hirwaun

Porth Yr Ogof Cave

Maen Llia Standing Stone

Devil's Elbow Climb from Heol Senni

The International Welsh Rarebit Centre

Glanusk Services

Bwlch Bryn-Rhudd

Glynneath Hill Climb

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