East Cairn Hill

East Cairn Hill stands in the Pentland Hills south-west of Edinburgh, the highest point in the City of Edinburgh council area. It forms part of a roughly thirty-two-kilometre ridge that stretches across three council boundaries: City of Edinburgh, Scottish Borders and West Lothian. The summit has two knolls, the eastern one reaching 567 metres and the western one 561 metres, about eight hundred metres apart. Three settlements lie within ten kilometres: Carlops to the south-east, West Calder to the north-west and Penicuik to the east. The Cauldstane Slap pass cuts between East and West Cairn Hill at 441 metres, marking the old route between West Lothian and the Borders. The hilltop cairn, about seventeen metres wide and two metres high, yielded flint axe tips and bone fragments when reopened early in the 20th century. Below the western slope lies Harperrig Reservoir, built in 1860 to dam the Water of Leith and supply Edinburgh while controlling downstream flow. The reservoir’s water surface reflects the surrounding hills and the changing light of the Pentlands. Paths lead up the grassy slopes to the two knolls, where walkers can look across Edinburgh to the Firth of Forth or south into the Borders. The Cauldstane Slap offers a gentler route between hills, while the reservoir shore provides a quieter walk beneath the western flank. On clear days the view stretches from Arthur’s Seat to the Lammermuirs, linking the city’s edge with the open moorland beyond.