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From hub: Crickhowell.
Distance: 35.4 km, 22.0 miles.
Difficulty: Red. (Learn about gradings)
O/S Ref: GR219 183 Explorer OL12 & Explorer OL13
Great climbs and even better descents are the feature of this cracking run. The terrain varies from farm tracks to forest roads, open hilltops and old sunken roads. Be prepared for an energetic ride.
| Visitor Centre Route | 8km | 5mi | |
| Mynydd Illtud | 24km | 15mi | |
| The Gap | 38km | 24mi | |
| Crickhowell Loop | 16km | 10mi | |
| Mynydd Du Forest | 35km | 22mi | |
| Heol Senni | 13km | 8mi | |
| Usk Reservoir | 9km | 6mi | |
| Cwm Treweryn | 14km | 9mi | |
| Sarn Helen | 34km | 21mi | |
| Llanfilo Loop | 18km | 11mi | |
| Llangors & Bwlch | 39km | 24mi | |
| Foothills of the Black Mountains | 32km | 20mi | |
| Grwyne Fawr Reservoir | 51km | 32mi | |
| The Tramway | 9km | 6mi | |
| Talybont Forest | 18km | 11mi | |
| Pontsticill Crossover | 34km | 21mi |
