Ordered by the number of climbs recorded. About dolerite.
| Crag | Location | # Climbs |
|---|---|---|
| Fair Head | United Kingdom / Northern Ireland / Ballycastle | 19 |
| Tremadog | United Kingdom / Wales / Gwynedd / Porthmadog | 10 |
| Tre Cime | Italy / Trentino-South Tyrol / Autonomous Province of Bolzano – South Tyrol | 7 |
| Clogwyn y Bustach | United Kingdom / Wales / Caernarfon | 4 |
| Crafnant | United Kingdom / Wales / Conwy Principal Area / Trefriw | 3 |
| Lorimer Park | United States / Pennsylvania / Montgomery County | 3 |
| Clogwyn Y Wenallt | United Kingdom / Wales / Caernarfon | 2 |
| Carreg Mianog Boulders | United Kingdom / Wales / Bangor | 2 |
| Moel y Gest Quarry | United Kingdom / Wales / Porthmadog | 2 |
| Kilt Rock | United Kingdom / Scotland / Portree | 2 |
| Peel Crag | United Kingdom / England / Northumberland / Hexham | 2 |
| Craig y Llyn | United Kingdom / Wales / Caernarfon | 2 |
| Trefasser Area | United Kingdom / Wales / Goodwick | 1 |
| Auchinstarry Quarry | United Kingdom / Scotland / North Lanarkshire / Glasgow | 1 |
| Neist | United Kingdom / Scotland / Highland Council / Isle of Skye | 1 |
| Crag Lough | United Kingdom / England / Northumberland / Hexham | 1 |
| Cambusbarron Quarry | United Kingdom / Scotland / Stirling / Stirling | 1 |
| Carn Liath | United Kingdom / Scotland / Portree | 1 |
| Staffin Slips | United Kingdom / Scotland / Portree | 1 |
| Pont Gyfyng | United Kingdom / Wales / Gwynedd / Garndolbenmaen | 1 |