Clare Balding walks with a group of friends in the Pentland Hills near Edinburgh, a group who've been walking together for twenty years and who share a love of what the writer Robert Louis Stevenson referred to as 'the hills of home'. The group walked out from the Loganlea Reservoir, up Carnethy and on to Turnhouse and Flotterstone before climbing Castlelaw Hill. Another steep climb to Allermuir is rewarded by great views of Edinburgh, the Firth of Forth and down the coast to Berwick on Tweed, before descending to Hillend for the finish of the walk.