Want to go road cycling around Onllwyn? We’ve reviewed all of the road rides around Onllwyn to identify the best. Explore them all here, and find your perfect road cycling route around Onllwyn.

Last updated: October 6, 2025

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1. Sarn Helen loop from Blaengwrach

21.1km

00:51

100m

Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.

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Easy

5.0

(1)

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2. Sarn Helen – Aberdulais Stone Bridge loop from Blaengwrach

44.7km

01:51

250m

Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.

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Easy

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5.0

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3. Sarn Helen – Glynneath Hill Climb loop from Seven Sisters

35.7km

01:34

320m

Intermediate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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Intermediate

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4. Penderyn Moor Climb – Beacons Reservoir loop from Glynneath

97.8km

04:32

1,170m

Expert road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

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Expert

5.0

(1)

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5. Aberdulais Stone Bridge – Cefn Coed Colliery Museum loop from Ystradgynlais

51.2km

02:18

540m

Intermediate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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Intermediate

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Browse the best Road cycling routes in other regions.

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The best road cycling routes around Onllwyn

1. Sarn Helen loop from Blaengwrach

2. Sarn Helen – Aberdulais Stone Bridge loop from Blaengwrach

3. Sarn Helen – Glynneath Hill Climb loop from Seven Sisters

4. Penderyn Moor Climb – Beacons Reservoir loop from Glynneath

5. Aberdulais Stone Bridge – Cefn Coed Colliery Museum loop from Ystradgynlais

Most popular routes around Onllwyn

Most popular attractions around Onllwyn

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