Drivelines
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
Plan a drive to C79
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
Plan a drive to C1242
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
Plan a drive to Townfoot (A686)
08
A686 · North Pennines · Spirited
Dual-trackSmooth surface

Townfoot (A686)

From Melmerby the A686 climbs in stacked hairpins to Hartside at 1,903 feet, runs on over Alston Moor to England's highest market town and drops down the Allen and South Tyne valleys to Haydon Bridge, a road the AA and Top Gear both put in their top-ten drives. The bends are wide and well cambered and the sightlines on the Melmerby side are long, so it rewards reading a corner ahead and smooth, deliberate inputs; the surface varies far more than the alignment does. The difficulty here is weather and exposure, not tightness.

There is no café at Hartside any more, as it burned down in 2018 and was demolished, but the summit car park still fills with bikes on a dry weekend, and the police know it: Melmerby is a known speed-check spot and the 50 limit toward Langwathby is enforced.

Distance
46.3km
Drive time
0h 52m
Total bend
13.4× UK avg
Climb
954m
StartEnd
Plan a drive to Allt Mor Place (B846)
07
B846 · Perthshire · Spirited
Mixed widthRough surface

Allt Mor Place (B846)

Thirty-two miles from Coshieville over the hill to Wade's 1730 crossing at Tummel Bridge, then west past Dunalastair Water to Kinloch Rannoch and the whole north shore of Loch Rannoch to the road's end at Rannoch Station. The lochside runs through birch woods on a surface that has never been smooth, and the last stretch past Bridge of Gaur onto the moor narrows to single track. It suits an unhurried rhythm: reading the surface and the dips matters more here than corner speed.

It is a dead end. The tarmac stops at Rannoch Station, 40 miles from the A9, and the nearest fuel is back in Pitlochry, Aberfeldy or Blair Atholl: fill up before you turn off.

Distance
51.9km
Drive time
1h 06m
Total bend
13.7× UK avg
Climb
937m
StartEnd
Plan a drive to Glenbeg Road (B8007)
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
Plan a drive to Kirkstone Pass (A592)
05
A592 · Lake District · Spirited
Dual-trackSmooth surface

Kirkstone Pass (A592)

At 1,489 ft the A592 over Kirkstone is the highest Lake District pass open to traffic, and unusually for the Lakes it is a proper two-way A-road with centre lines and no hairpins. From the Windermere side it is a long, shallow climb, 10 km at an average of 3.6% and peaking at 12 to 13% near the top, which is why it rewards momentum and smooth steering rather than gear-hunting; the Patterdale side is shorter and steeper, up to 18% past Brothers Water. The Brotherswater-to-Hird Wood section was rebuilt under the Safer Roads Fund in 2023 to 2024 with new drainage and crash barriers, so the surface is as good as it has been.

The road was shut for eight months after the November 2025 landslip at High Kingate and only fully reopened in July 2026. The summit inn had been closed for some years by then, though its pay-by-app car park kept operating, so plan a stop in Ambleside or Glenridding rather than at the top.

Distance
52.4km
Drive time
1h 17m
Total bend
14.9× UK avg
Climb
1115m
StartEnd
Plan a drive to Lagg Bridge (C147)
04
C147 · Isle of Arran · Spirited
Dual-trackVaried surface

Lagg Bridge (C147)

This is the 32 miles of Arran's ring road the island lost as an A-road: the A841 between Dippen and Lochranza via Blackwaterfoot was downgraded in 2009, and the C147 now runs round the south coast and up the west. It keeps the bones of a trunk road, two lanes most of the way, but the south coast between Kildonan and Blackwaterfoot narrows to passing places in stretches, so the driving is about reading where the width gives out rather than hunting for corners. The Sliddery section is the most undulating, with a twisting drop to Sliddery Bridge and a climb straight back out.

The Ross Road joins between Sliddery and Lagg at the war memorial; it is single-track with passing places, so give anything emerging from it room. The Lagg Hotel, the oldest inn on Arran and dating from 1791, and the distillery that opened in 2019 are the obvious stops.

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

B869

The B869 is the 22-mile single-track loop out of Lochinver past the Achmelvich and Clachtoll turnings, over the crests to Drumbeg and Nedd, and down to the A894 near Kylesku. It never gets above 132 m yet its ramps reach 25%, and it scores a full 10 for curvature: crest, blind bend, passing place, repeat. This is low-gear driving that rewards reading the road two corners ahead and stopping early for whatever is coming the other way.

The steepest pitches are all at the eastern end between Drumbeg and Kylesku, with a 25% drop to Loch Nedd; it is signed unsuitable for coaches and caravans, and in summer the beach traffic for Achmelvich and Clachtoll fills the western miles.

Distance
35.5km
Drive time
1h 00m
Total bend
17.1× UK avg
Climb
898m
StartEnd
Plan a drive to Honister Pass (B5289)
02
B5289 · Lake District · Expert
Mixed widthSmooth surface

Honister Pass (B5289)

The B5289 runs 20 miles from Keswick to High Lorton, but the pass itself is the 1.4-mile pitch above Seatoller: an average of 10%, the last third at 22%, topping out at 1,167 ft beside the slate mine. Width is the discipline as much as gradient. There are stretches where two cars cannot comfortably pass and the passing places are unmarked, so it rewards early sightline reading and a willingness to hold back; the Buttermere side is longer and gentler, only steepening to around 20% near the top.

Hold a low gear on the way down rather than the brakes, and expect winter closures for ice: the council shut it at the police's request as recently as January 2026, and a 10 mph limit with a 20-tonne weight restriction was imposed between the mine and Seatoller after a culvert failed in 2024.

Distance
32.2km
Drive time
0h 53m
Total bend
17.2× UK avg
Climb
826m
StartEnd
Plan a drive to B8073
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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