take the track that heads towards the hills. There is a signpost: ‘Castlelaw by the Howden Glen, with the co-operation of the landowner’.
Follow this track, which is tarmac in places, passing a copse of trees on a knoll called Chucklie (mistakenly) or Chuckie (correctly) Knowe. (The 1852 OS map shows a quarry here, and ‘chuckie’ is the Scots word for pebble.)
Capital views from the drystone seat commemorating the centenary of World War 1
The place names in this area are interesting. Dreghorn is recorded as ‘Dregerne’ in 1240, ‘Dregarne’ in 1374 and ‘Dragorn’ in 1682. The name is British, from dre, ‘the farm’, and gronn, ‘a bog’. Capelaw Hill is part Celtic, ceap meaning ‘pointed hill’ (also referring to the Kips) and part Anglian, law also meaning ‘conical hill’. The 1794 Statistical Account applies the name Capelaw to Allermuir Hill. For a full description of place names refer to S Harris’s The Place Names of Edinburgh, Their Origins and History (see bibliography).
Keep on the track, crossing a broken gate, fording a small burn and heading on the track up a grassy area until you eventually cross a bridge and reach a small stone building, Green Craig Cistern.
‘Edinburgh Thomas Elder Praefect MDCCIXC’ is carved on the lintel of Green Craig Cistern. Thomas Elder of Forneth was lord provost of Edinburgh from 1788 to 1790, and the construction of a water pipeline to supply the city was begun during his tenure.
Green Craig Cistern, with Arthur’s Seat in the distance
Go past the cistern and head up a grassy track to the southwest. Much of the gorse has been cleared to allow native trees and shrubs to be planted, and to enable the planting of the First World War Centenary Wood, opened by the Princess Royal on 23 May 2015. There is a lovely drystone seat with magnificent views over Edinburgh.
2 Remain on the track as it climbs up the slope of White Hill (not named on OS66) and keep to it on rising ground that can be boggy in places.
3 As the ground levels out you will reach a tumbled-down drystane dyke and you may need to pick your way through the rushes alongside the dyke and fence. Keep on this path until you reach a cattle-grid and gate at NT217665.
Pick up a path that goes right, to the plantation around Bonaly Reservoir. Follow the fence and drystane dyke on your right until you reach a gate. Go through the gate and walk straight ahead downhill for a few metres, where there is a signpost indicating Bonaly.
4 Follow the path to Bonaly and you will see Bonaly Reservoir on the left. A pleasant diversion is to walk around the perimeter of the reservoir, picking out a narrow path that starts by the plantation (this is included in the 7km distance for this walk).
The present Bonaly Reservoir was constructed in 1851 to replace two smaller reservoirs, built in 1789 when Edinburgh’s expanding New Town was placing greater demands on the water supply. In 1786 the town council drew up plans to create two ponds at Bonaly, and after a prolonged court case these reservoirs were built. The abandoned dam at NT212663, to the northeast of the present dam, is a relic of the first reservoir. The present-day reservoir was constructed on the site of the second reservoir.
Back at the point from which you made your diversion round the reservoir, there is a good track leading downhill towards the woodlands of lower Bonaly Country Park.
An area of heather moorland lies to the west of the track, and curlew, skylark, meadow pipit and red grouse are heard and sometimes seen here. The views across to the Ochils and beyond are spectacular on a clear day. To the east, Dean Burn cuts its way down a steep rocky gorge. The ungrazed slopes are where juniper, rowan and birch grow, and common blue butterflies feed in sunny spots in summer.
Go through the gate at the top of the woodland, where there is another signpost indicating Bonaly. Follow this track down, past a disused building on the right and a circular stone viewpoint on the left, to reach a car park. Don’t go through the gate into the car park.
A sign by the gate at the car park indicates Dreghorn. Follow this sign and take a small path that cuts down through the trees to cross a burn by a wooden bridge. The path is very narrow here, and after about 10m ascends to a few steps to the left. An orienteering control post is here in the shrubs.
5 From the top of the steps take this path as it leads off to the east and follows the perimeter fence of Bonaly Scout Camp. There has been a good deal of woodland creation on these slopes. Areas have been fenced to exclude deer and to allow natural regeneration and additional protection to planted native woodland. The path climbs steeply and eventually flattens out, then descends through a grassy area to a gate. There is another signpost indicating Dreghorn just next to the gate. Go through the gate and walk across the field ahead of you, on a grassy path under a line of electricity pylons that marches parallel to the city bypass, roaring 400m away to your left.
Having crossed the field, the path leads onto another track next to a hedge. Stay on this until you reach a cattle-grid, and the foundations of Dreghorn Mains, a ruined farm, is on your left. The farm is about 1km from the gate and previous sign to Dreghorn. A SRWS sign at the cattle-grid points your return to Dreghorn car park, passing the farm buildings and going through a small wooden gate, with the traffic on the bypass tearing by.
Dean Burn Gorge
WALK 4
Three reservoirs
| Start/Finish | Bonaly upper car park (NT211675) |
| Distance | 9km |
| Total Ascent | 214m |
| Time | 2hr 30min |
| Maps | Ordnance Survey Landranger 66 or Ordnance Survey Explorer 344 |
A hill walk taking in three reservoirs. The going is generally easy, and there is a good mix of cultural heritage and wildlife to enjoy along the way. (It is possible to lengthen this route by walking to Harlaw and completing a circuit of the reservoir (Walk 6).)
1 Start at Bonaly upper car park, beyond the scout camp on Bonaly Road.
Note Alternative parking is available just beyond the bridge over the A720, and this is preferable in winter, when the narrow road can be icy and it is difficult to manoeuvre a vehicle. The route from the alternative parking passes Bonaly Tower, an integral part of the cultural heritage of the area.
Bonaly Tower was built for Lord Henry Cockburn in 1811. Cockburn was an outstanding lawyer, becoming solicitor-general in 1830 and a judge of the Court of Session in 1834. He was a popular and influential figure, well connected with the great and the good of the day. He founded the Friday Club with Sir Walter Scott in 1803, and often invited friends to spend a hill day at Bonaly. Among this circle were James Naysmith, the inventor of the steam hammer, and the artists David Octavius Hill and James Ballantyne. Bonaly Tower is a private residence, now divided into flats. Edinburgh Corporation purchased 65 acres of ground here for the city’s water supply, and thus formed the basis of Bonaly Country Park.
From the upper car park (NT211675) go through the gate and take the track that climbs steeply uphill into the plantations, following the signpost that indicates Glencorse until you reach a gate. Go through this gate, which opens out onto heather moorland, and keep on this track, going through yet another gate leading into Bonaly Reservoir compound. This is a distance of about 1km.
2 A few metres to the right, take a narrow path in the heather leading over to the north end of Bonaly Reservoir dam. Either walk along the top of the dam,