GB · Highest raw curvature/8 min read

The 10 best driving roads in Great Britain (By Curvature).

Forget the curated lists of motoring folklore. We processed the entire GB road network to find the absolute twistiest stretches of tarmac, ranked entirely by raw geometric curvature.

By Drivelines·Published 08 May 2026
REGION OVERVIEW

By the numbers: what makes a road truly curvy?

Curated lists of the best driving roads tend to favour sweeping vistas, smooth tarmac, and famous names. But when you rank the GB network purely by raw OpenStreetMap curvature—the total geometric bend measured end-to-end—the results look very different. The highest ranks don’t go to the flowing A-roads of motoring legend, but to relentless single-track coastal loops, dense passes, and lengthy B-roads where the cornering never fully stops. Here are the 10 most geometrically twisted stretches of tarmac in the country, ranked by the sheer volume of steering input required to traverse them.

Routes mapped
10
Total distance
390km
Avg curve idx
8.3/10
Map of all 10 routes in gb-curviest
StartEnd
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10
C79 · Outer Hebrides · Expert
Mixed widthRough surface

C79

Snaking across the rocky terrain of the Outer Hebrides, this 11-mile road hits a phenomenal 1244 curvature density per mile. It is the definition of a highly technical drive, with the tarmac folding itself around the landscape in endless deviations. It requires smooth, decisive inputs at low speeds.

Sheep have a habit of sleeping on the warm tarmac in the evening, so treat blind bends with caution.

Distance
18.9km
Drive time
0h 36m
Total bend
13.3× UK avg
Climb
357m
StartEnd
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09
C1242 · Scottish Highlands · Expert
Single-trackRough surface

C1242

Scoring a maximum 10 for curvature and nearly 1100 bends per mile, this 13-mile single-track is a masterclass in technical driving. It packs an astonishing amount of geometry into a short distance, asking for constant steering inputs and careful gradient management on a rough surface.

Passing places are infrequent on the steepest sections, so read ahead to avoid awkward reversing.

Distance
21.5km
Drive time
0h 43m
Total bend
13.3× UK avg
Climb
450m
StartEnd
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08
A686 · North Pennines · Spirited
Dual-trackSmooth surface

Townfoot (A686)

Climbing into the North Pennines from Alston, the A686 is a classic ribbon of upland tarmac. Over nearly 30 miles, it weaves across the moors with a flowing, rhythmic character rather than punishing hairpins. It’s wide and generally smooth, offering generous sightlines that allow you to read the road far ahead.

Strong crosswinds over the exposed moorland sections can destabilise lighter cars, especially near the summit.

Distance
46.3km
Drive time
0h 52m
Total bend
13.4× UK avg
Climb
954m
StartEnd
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07
B846 · Perthshire · Spirited
Mixed widthRough surface

Allt Mor Place (B846)

Running towards Kinloch Rannoch, this 32-mile route scores a relatively low 5.6 for curvature index but ranks highly due to its sheer length. It’s a road of sweeping curves rather than tight technical bends, rewarding patience and precise positioning.

The surface along the lochside section can be uneven, throwing off your rhythm if you push too hard.

Distance
51.9km
Drive time
1h 06m
Total bend
13.7× UK avg
Climb
937m
StartEnd
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06
B8007 · Ardnamurchan · Expert
Single-trackRough surface

Glenbeg Road (B8007)

Stretching out towards the most westerly point of the mainland, the B8007 is a rough, single-track ribbon that scores a 9.8 curvature index. It threads through dense woods and bare moorland, demanding constant line-choice and respect for blind crests over its 19 miles.

The verge is soft and often hides deep drops, making passing maneuvers at the narrowest points tricky.

Distance
30.7km
Drive time
0h 44m
Total bend
14.2× UK avg
Climb
533m
StartEnd
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05
A592 · Lake District · Spirited
Dual-trackSmooth surface

Kirkstone Pass (A592)

At over 32 miles, this route through the Lake District uses sheer length to accumulate a high total curvature score. While the headline Kirkstone Pass section is steep, the broader road is flowing and wide, scoring a modest 6.0 curve index. It provides a rhythmic, engaging drive rather than a frantic one.

Traffic builds quickly on weekend mornings, making an early start essential for an uninterrupted run.

Distance
52.4km
Drive time
1h 17m
Total bend
14.9× UK avg
Climb
1115m
StartEnd
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04
C147 · Isle of Arran · Spirited
Dual-trackVaried surface

Lagg Bridge (C147)

Tracking the southern edge of the Isle of Arran, this 32-mile stretch earns its rank through length and sustained, flowing corners. With a curvature index of 6.2, it falls into the sweet spot for an engaging drive, rewarding drivers who read the camber and carry momentum smoothly.

The coastal views are tempting, but the occasional sudden narrowing of the road requires you to stay focused on the tarmac ahead.

Distance
51.5km
Drive time
1h 39m
Total bend
15.0× UK avg
Climb
577m
StartEnd
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03
B869 · Assynt · Expert
Single-trackVaried surface

B869

The B869 wraps around the gnarly coastline of Assynt in the far northwest. Scoring a perfect 10 for curvature, this 22-mile single-track road rises, falls, and folds around rocky outcrops, meaning you're working the steering wheel constantly. It demands patience and precision rather than pace.

Forward visibility is severely restricted by crests, so assume a motorhome is coming the other way until proven otherwise.

Distance
35.5km
Drive time
1h 00m
Total bend
17.1× UK avg
Climb
898m
StartEnd
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02
B5289 · Lake District · Expert
Mixed widthSmooth surface

Honister Pass (B5289)

Scoring a flawless 10 for curvature index, Honister Pass compresses tremendous cornering density into its 20 miles. It climbs and plunges through the central fells, with steep gradients and a per-mile density that approaches true hairpin territory. It rewards smooth inputs and careful momentum management on the steeper pitches.

The descent loses grip in the wet long before you'd expect, especially near the slate mine.

Distance
32.2km
Drive time
0h 53m
Total bend
17.2× UK avg
Climb
826m
StartEnd
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01
B8073 · Isle of Mull · Expert
Single-trackRough surface

B8073

The highest raw curvature in the UK isn't found on a famous alpine-style pass, but on this northern loop of the Isle of Mull. Over 30 miles of rough single-track, it scores a 9.7 curvature index, demanding continuous sightline reading as it works around the coastline. It offers long, sustained corner-work with almost zero straight-line relief.

Keep an eye out for wandering livestock and loose gravel that accumulates on the outside of the tighter bends.

Distance
49.6km
Drive time
1h 30m
Total bend
22.6× UK avg
Climb
768m
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