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Glencorse Reservoir Overflow – Harlaw Reservoir loop from Heriot-Watt University

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Hiking trails & Routes

Glencorse Reservoir Overflow – Harlaw Reservoir loop from Heriot-Watt University

Moderate

5.0

(1)

hikers

Glencorse Reservoir Overflow – Harlaw Reservoir loop from Heriot-Watt University

02:53

10.7km

150m

Hiking

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: May 18, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Pentland Hills Regional Park

Waypoints

Start point

Bus stop

Get Directions

4.84 km

Glencorse Reservoir Overflow

Highlight • Structure

Unless absolutely sure of conditions, use the path

Tip by

5.06 km

Threipmuir Reservoir and Harlaw Reservoir

Highlight • Trail

Threipmuir Reservoir (west) & Harlaw Reservoir (east) where built in the mid-1800s to increase the water supply for the Edinburgh area. Both have great lakeside trails for a flatter run in the Pentlands.

Tip by

6.46 km

Harlaw Reservoir

Highlight • Structure

Harlaw Reservoir was constructed between 1843 and 1848, at the same time as the larger Threipmuir Reservoir upstream. It's a simple gravity earth dam construction that adds to the volume of water available for Edinburgh.

Tip by

6.71 km

Harlaw Reservoir

Highlight • Viewpoint

Harlaw Reservoir is a popular spot for outdoor activities including walking, fishing, and wildlife watching. One of the highlights is a small embankment on the far side of the reservoir …

Tip by

10.7 km

End point

Bus stop

Way Types & Surfaces

Way Types

5.86 km

2.12 km

1.53 km

1.03 km

106 m

Surfaces

4.10 km

2.78 km

1.79 km

889 m

658 m

438 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Weather

Tuesday 7 July

25°C

13°C

0 %

Additional weather tips

Max wind speed: 17.0 km/h

to get more detailed weather forecasts along your route

Comments

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Glencorse Reservoir Overflow – Harlaw Reservoir loop from Heriot-Watt University

Glencorse Reservoir Overflow

Threipmuir Reservoir and Harlaw Reservoir

Harlaw Reservoir

Harlaw Reservoir

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