A hill and valley circuit on the Scottish side of the Cheviots, following the old drove road known as The Street before returning beside the Heatherhope Burn. Allow about 3 hours 30 minutes for the 10.3 km route, including the climb, gates and short pauses.
Start on the roadside verge beside the public road immediately southwest of Greenhill House, also called Greenhill Lodge. This is limited roadside space, not a car park. Park completely clear of the carriageway, bridge, driveways and farm entrances. Check the signs and ground conditions on arrival; do not park inside the lodge grounds or block a passing place. There are no public toilets or refreshments on the circuit.
Walk north along the minor road to Hownam, keeping alert for vehicles on the single-track sections. At the village follow the track east onto The Street. The sustained climb takes you past Horseshoe Wood and below Hownam Rings, with views opening across the valley. Stay on the main drove track at the junctions, continuing southeast above the Heatherhope valley.
Beyond the tracks leading towards Blackbrough Hill, turn right onto the established track that winds down to Heatherhope, close to the northern end of the reservoir. Follow the valley road downstream, crossing the burns on the mapped bridges and returning through Mainside to Greenhill. Use the through road at the farm rather than wandering into yards or the lodge drive.
Expect firm road sections, rough stony and grassy tracks, gates and some muddy ground after rain. The uphill section and descent need steady footing. The route stays on established tracks and does not climb the hillfort summit or continue onto the high border ridge. Carry a map and suitable hill-walking clothing, as mist can obscure junctions and mobile reception is patchy. Keep dogs on a lead around sheep and other livestock, close gates and follow any temporary land-management notices.
Route and access references: Scottish Borders Council adopted core path plan, Area 53; Scottish Borders Hill Walking Club Hownam report, which describes the shorter Street and Heatherhope valley circuit; and Scottish Mountain Rescue, Favourite Walk by Bill Glennie, 3 April 2024, for the Greenhill verge start and valley return. Sources checked in October 2026.