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Electric Mountain / Marchlyn Mawr from Tregarth via Sling

2
5.0
2 reviews | Elevation profile | 1 photo
Electric Mountain / Marchlyn Mawr from Tregarth via Sling
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Elevation profile Electric Mountain / Marchlyn Mawr from Tregarth via Sling

Statistics

Difficulty points 468
Length 9.1 km
Average gradient 6.1%
Steepest 100 metres 12.6%
Total ascent 554 m

Short recap

Beautiful scenery
2 hairpin turns
#6 toughest climb of Wales
#3 most elevation gain of Wales
#12 longest climb of Wales
#65 average steepest climb of Gwynedd
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Electric Mountain / Marchlyn Mawr from Tregarth via Sling is a climb in the region Gwynedd. It is 9.1 km long and bridges 554 m of vertical ascent with an average gradient of 6.1%, resulting in a difficulty score of 468. The top of the ascent is located at 636 m above sea level. Climbfinder users shared 2 reviews of this climb and uploaded 1 photo.

Road names: Lon Bach & Lon Las Ogwen

5.0 by AdrianN
What a cracker this is. Never too steep, topping out at about 12％. But it is pretty steady. You'll have to lift your bike over the gate. But then it's traffic free. Don't forget to do the climb to the surge pond as well!... read more

Photos (1)

Electric Mountain / Marchlyn Mawr from Tregarth via Sling
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Reviews (2)

5.0
4.0
3.0
2.0
1.0
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AdrianN
AdrianN
9 Mo 5.0 via the Climbfinder app

What a cracker this is. Never too steep, topping out at about 12％. But it is pretty steady. You'll have to lift your bike over the gate. But then it's traffic free. Don't forget to do the climb to the surge pond as well!

Dashboard
Willyx
Willyx
11 Mo 5.0

I started the climb in Tregarth but it's the final section up the dam road (after the gate) that really scores - traffic free apart from, maybe, an occasional service vehicle. Tarmac throughout BUT watch the cattle grids(s) on the descent as they have a raised concrete lip. On the climb, at around 1 km from the gate, there is a junction to the right up to the surge pond - another stunning climb which actually finishes 11 m higher (654m) than the climb to the dam. Stunning views on both climbs.

Dashboard

Climbing times

7 km/h 01:18:23
11 km/h 00:49:52
15 km/h 00:36:34
19 km/h 00:28:52

Road surface condition

67% 33% 0%
Based on 3 votes
Share your knowledge. What was the road condition during your ascent?

Traffic

100% 0% 0%
Based on 3 votes
Your experience counts. How much traffic did you encounter during the climb?

Frequently Asked Questions

Electric Mountain / Marchlyn Mawr can be cycled from 2 sides. Electric Mountain / Marchlyn Mawr from Tregarth via Sling is the most popular side, but the summit can also be reached via Electric Mountain / Marchlyn Mawr from Brynrefail.

Electric Mountain / Marchlyn Mawr from Tregarth via Sling is a challenging ascent. For this type of climbing, we recommend mountain gearing, specifically a compact system. This means a small front chainring of 34 teeth, combined with a rear cassette where, depending on your level, strength, and experience, you choose a sprocket with 30, 32, or even 34 teeth. Remember that a smooth cadence is always more efficient!

Electric Mountain / Marchlyn Mawr from Tregarth via Sling is a serious climb and falls into the 2nd category. With a good basic fitness level, even without much cycling experience, you can complete this climb just fine. However, a bike with climbing gears is a must. Without experience or training, it will be really tough – but that’s part of the challenge!

Electric Mountain / Marchlyn Mawr from Tregarth via Sling is 9.1 km long.

The average gradient of Electric Mountain / Marchlyn Mawr from Tregarth via Sling is 6.1%.

Electric Mountain / Marchlyn Mawr from Tregarth via Sling has a steepest segment with an average gradient of 12.6%.

The summit of Electric Mountain / Marchlyn Mawr from Tregarth via Sling is at 636 m.

At a slow pace of 7 km/h, it takes about 01:18:23 to climb Electric Mountain / Marchlyn Mawr from Tregarth via Sling. At 11 km/h the time is 00:49:52, and at 15 km/h 00:36:34. For the fastest cyclists, 00:28:52 is an achievable time.

Electric Mountain / Marchlyn Mawr from Tregarth via Sling is located in the region Gwynedd in Wales.

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