25m. The towering arete is one of Dumby's best lines and gives a brilliantly adventurous pitch at E4 6a **/*** - an essential tick for any capable leader. Climb up right of the arete to eventually meet it at a good rest (big cams) a bit below the thin crack. Fill this with every micro-wire you own, then make wild moves up it onto the wall above. Look down at those micro-wires, take a deep breath, and climb the juggy wall with minimal gear to easier ground and the finish.