Pen-y-Benglog via Lôn Las Ogwen

Statistics

Difficulty points	92
Length	1.9 km
Average gradient	5.5%
Steepest 100 metres	14%
Total ascent	105 m

Difficulty points

Length

1.9 km

Average gradient

5.5%

Steepest 100 metres

14%

Total ascent

105 m

Short recap

Hidden gem

#68 toughest climb of Gwynedd

#80 most elevation gain of Gwynedd

#97 longest climb of Gwynedd

#84 average steepest climb of Gwynedd

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Willyx

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If youre riding south out of Bethesda up to Llyn Ogwen ignore the busy A5 and take this route instead. It runs parallel to the A5 up the spectacular U-shaped glaciated valley of the Nant Ffrancon but on the opposite side of the river. Unlike the graded climb on the A5 all the action on this route happens at the end. The ride along the valley floor is a real delight but then the road (a narrow singletrack) rears up steeply to climb the headwall of the valley up to Llyn Ogwen. It's a magnificent climb, steep throughout but the hardest inclines are relatively short-lived. There is hardly any traffic and you're more likely to come across walkers in the road rather than vehicles. The surface is a bit broken up in places but easily rideable on a road bike. The climb finishes at Ogwen Cottage where there are toilets and a snack bar. After that you're bacck on the A5 again.

Climbing times

7 km/h	00:16:17
11 km/h	00:10:21
15 km/h	00:07:35
19 km/h	00:05:59

Road surface condition

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Traffic

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Frequently Asked Questions

Pen-y-Benglog can be cycled from 2 sides. Pen-y-Benglog via Lôn Las Ogwen is the most popular side, but the summit can also be reached via Llyn Ogwen.

You don't need special gearing for Pen-y-Benglog via Lôn Las Ogwen. The slope isn't long or steep enough to require much shifting down. You can conquer this climb on power alone. However, a compact gearing system with a smallest front chainring of 34 and largest rear sprocket of 28 or 30 is always nice if you enjoy cycling uphill. This helps maintain a smooth cadence.

Pen-y-Benglog via Lôn Las Ogwen is a 4th-category climb. A sprint to the top is usually not an option, and untrained riders will definitely feel it in their legs. For trained cyclists, it is a great training climb.

Pen-y-Benglog via Lôn Las Ogwen is 1.9 km long.

The average gradient of Pen-y-Benglog via Lôn Las Ogwen is 5.5%.

Pen-y-Benglog via Lôn Las Ogwen has a steepest segment with an average gradient of 14%.

The summit of Pen-y-Benglog via Lôn Las Ogwen is at 304 m.

At a slow pace of 7 km/h, it takes about 00:16:17 to climb Pen-y-Benglog via Lôn Las Ogwen. At 11 km/h the time is 00:10:21, and at 15 km/h 00:07:35. For the fastest cyclists, 00:05:59 is an achievable time.

Pen-y-Benglog via Lôn Las Ogwen is located in the region Gwynedd in Wales.

Statistics

Short recap

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Reviews (1)

Climbing times

Road surface condition

Traffic

Frequently Asked Questions

Which sides of the Pen-y-Benglog can be cycled up?

What gearing is needed for Pen-y-Benglog via Lôn Las Ogwen?

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