150m. Starts not far from the tarn at the left side of the corrie where an unmissible steep, deep chimney can be spotted. Up the initial chimneys exiting left (or exiting direct at a probable IV or very stiff III) to an obvious thread belay above the chimneys at 43m. Easy ground for 30m leads to a small ampitheatre and the commencement of a series of short walls leading to the natural continuation of the gully high up - this is bordered on the right by a dihedral/buttress. The ice here can be thin and hard to protect and often forms the crux. This leads to easier ground, and eventually the top of the mountain. Note: many parties will find various grade III ice options beyond the initial chimneys and second ice wall, especially the often 'wow, I got a 25cm ice screw in that to the hilt' fat ice of the Blea Water Ice Fall, so deviations, variations and the exact line after the chimneys will vary from party to party and season to season, dependent on ice formation.