Castle Crag is the smallest of Wainwright’s fells, the only one appearing in his Guide with an elevation of less than 1,000 ft (his usual criterion for selection). He approved of it being ‘so magnificently independent, so ruggedly individual, so aggressively unashamed of its lack of inches’. Its height is 290 m (950 ft); its prominence around 75 m (246 ft) and it is an outlier of High Spy. It lies in the narrow gorge known as the ‘Jaws of Borrowdale’, seeming to block access to the valley beyond. At its summit is an impressive circular slate cairn which bears a memorial to those men from Borrowdale killed in WWI. Routes to the top begin in Grange in Borrowdale or Rosthwaite.