Start at Bowderdale - go south along the ridge to the east of Bowderdale onto Randygill Top(624m) - over Kensgriff to Yarlside(639m) - down to the top of Cautley Spout and along the top of Cautley Crag to Great Dummacks (663) - onto Calders and Bram Rigg Top (672m) - onto the Calf(676m) - over Bush Howe and out to Fell Head(623m) - down to Black Force then back over Uldale Head and Rispa Pike with a bit of cross country to get back to Bowderdale.
Visits all the 2000ft tops and the more interesting parts of the Howgills. Not measured it but probably around 16 miles