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Touring cycling around Harlaw Reservoir offers varied terrain within the scenic Pentland Hills, southwest of Edinburgh. The area features tranquil reservoir views, woodlands, and rolling hills. Cyclists can navigate a mix of paved and unpaved surfaces, with routes providing vistas of other reservoirs like Threipmuir and Glencorse. The landscape includes open fields and tree-lined sections, characteristic of the Pentland Hills Regional Park.
Last updated: May 15, 2026
16
riders
Hard bike ride. Great for any fitness level. You may need to push your bike for some segments of this route.
10
riders
Easy bike ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.

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7
riders
Easy bike ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
3
riders
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4
riders
Hard bike ride. Good fitness required. You may need to push your bike for some segments of this route.
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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 which offers stunning views of Threipmuir Reservoir. On weekends visitors you can get your hands on some homemade crepes from a local van parked near the Harlaw House Visitor Centre.
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This is a great bike section with a nice approach over the bridge and causeway of Threipmuir Reservoir that has great views over each side. Exponential Hill itself is a beautiful tree-lined avenue that is very scenic. The section itself is only 462 metres long but has a sharp 49 metres of height gain. A stunning place overall and a nice hill section to take in on the way to Bavelaw Castle.
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Pretty steep uphill from Threipmuir to Harlaw. Easy enough to walk up/down.
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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.
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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.
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North Esk Reservoir is an easy 5k walk from Carlops village. You can park your car in the village and choose one of the two main paths or do a circular walk. Easy to intermediate terrain with some steep hilly parts as well. The reservoir is a gem.
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Great views - well worth the climb up (525m)
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There are nearly 280 touring cycling routes around Harlaw Reservoir, offering a wide range of options for different skill levels and preferences. Over 100 of these are classified as easy, making the area accessible for many cyclists.
The terrain around Harlaw Reservoir is quite varied, characteristic of the Pentland Hills. You'll encounter a mix of paved roads, unpaved paths, and access roads. Some sections involve significant climbs, while others offer enjoyable downhill stretches, providing a diverse cycling experience. For more rugged sections, a hybrid or mountain bike might be beneficial.
Yes, there are many family-friendly options. For an easier ride, consider the Glencorse Reservoir Overflow β Threipmuir Reservoir loop from Lennox Tower, which is an easy 4.2-mile (6.7 km) path offering a gentler loop around the reservoirs. Another easy option is the Threipmuir Reservoir β Glencorse Reservoir Overflow loop from Balerno, which is 5.3 km long.
Convenient car parks are available directly at Harlaw Reservoir and the adjacent Threipmuir Reservoir, making it easy to start your cycling adventure. The area is also easily accessible from Edinburgh, located about 8 miles southwest of the city center near Balerno.
Cyclists can enjoy stunning vistas of the rolling Pentland Hills and tranquil reservoir views. The small embankment on the far side of Harlaw offers exceptional views of Threipmuir Reservoir. Higher points like Allermuir Hill provide expansive views of central Scotland, including the Firth of Forth bridges and even distant mountains. You might also encounter tree-lined avenues like 'Exponential Hill' and areas with purple heather.
Yes, beyond the natural beauty, you can discover historical sites. Nearby Bavelaw Castle and the ruins of Cairns Castle add cultural interest to a visit, offering glimpses into the region's past as you cycle through the landscape.
Absolutely. From Balerno, you can connect to the Water of Leith Walkway, a well-surfaced cycling and walking trail that extends into Edinburgh. For longer excursions, the Cross Borders Drove Road can be picked up southwest of Harperrig Reservoir, allowing you to extend your routes further into the Pentland Hills.
The area is highly rated by the komoot community, with an average score of 4.4 stars from nearly 300 reviews. Cyclists often praise the tranquil reservoir views, the varied terrain that keeps rides interesting, and the sense of being immersed in nature within the Pentland Hills Regional Park.
Yes, for those seeking a challenge, routes like the Threipmuir Reservoir β Glencorse Reservoir Overflow loop from Lennox Tower offer a more difficult experience. This 9.5 km route includes climbs and varied terrain, providing a good workout with rewarding views of both Threipmuir and Glencorse Reservoirs.
The Harlaw House Visitor Centre is a convenient stop. On weekends, you might find a local van nearby selling homemade crepes, sandwiches, and hot drinks, perfect for a refreshment break during your ride.
The Pentland Hills offer beautiful scenery year-round. Spring and summer provide lush greenery and longer daylight hours, while autumn brings vibrant colors to the woodlands. Even in winter, with appropriate gear, the tranquil landscapes can be enjoyed, though some paths might be more challenging due to weather conditions.
Yes, many routes are designed as loops, allowing you to start and end at the same point. For example, the The Red Road, Pentland Hills β Balerno Hill Summit loop from Red Moss of Balerno Wildlife Reserve is a moderate 17.5 km circular trail that takes you through the heart of the Pentland Hills.


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