For London cyclists, the Surrey Hills are more than just a training ground – they’re a proving ground. Whether you’re chasing PBs, building strength for racing season, or simply seeing how long you can hang onto a fast group ride, these climbs have a habit of exposing exactly how your legs are feeling.
Riders will debate forever about which climbs deserve a spot in the top 10 – but don’t worry, we’ll be featuring even more climbs in a follow-up.
Along with our top ten climb recommendations, we’ve included links to club routes from our Route Book that feature one or more of these iconic hills.
Climb Categorisation
A quick note on climb categorisation before we continue.
Cycling hills are categorised from 4 (easiest) to 1 (hardest), plus “Hors Catégorie” (HC – French for ‘beyond categorisation’), based on length, average gradient, and, subjectively, their position in a race. There are differences in how categories are assigned between say the Tour De France organisers (subjective), the UCI and Strava (algorithmic) – but that’s a whole separate article.
- Hors Catégorie (HC): The hardest. Usually over 15 km with an 8% or steeper average grade (e.g., major Alpine passes).
- Category 1: Very difficult, long, steep climbs. Roughly 5-10 km at 8%+ grade, or over 15 km at 6%.
- Category 2: Moderate-to-hard, typically 5-10 km at 5-7% grade or >32,000 m length/gradient formula.
- Category 3: Moderate, manageable hills. Usually 2-3 km at 8% or ~4 km at 6%.
- Category 4: Small, short hills. Generally over 4 km at 4% or short steep banks.
- Category 5: (or Unclassified): Very short, minor, or shallow, steep walls, often used in smaller races.
The Climbs
1. Staple Lane
- Difficulty: 9/10
- Length: ~2.5km
- Average Gradient: ~4%
- Max Gradient: ~12%
- Elevation Gain: 100m
- Climb Category: 4
Staple Lane is where things get serious. Narrow, steep, and unapologetic, it’s a climb that commands respect. The gradients bite hard, the road feels claustrophobic, and there’s very little chance to recover once you’re committed. For many riders, this is the climb they remember most – whether fondly or otherwise.
2. Whitedown Lane
- Difficulty: 8/10
- Length: ~1 km
- Average Gradient: ~11%
- Max Gradient: ~14%
- Elevation Gain: 87m
- Climb Category: 4
Short. Brutal. Honest. Whitedown is one of the most notorious climbs in the area, packing serious gradient into just over a kilometre. There’s no easing into it – the road kicks up early and stays that way. It’s often used as a yardstick for climbing fitness, and it’s rare to finish Whitedown without questioning a few life choices.
3. Leith Hill (Coldharbour Lane)
- Difficulty: 7/10
- Length: ~2 km
- Average Gradient: ~7%
- Max Gradient: ~15%
- Elevation Gain: 133m
- Climb Category: 4
Leith Hill is the undisputed heavyweight of Surrey climbing. Long, steady, and mentally demanding, it rewards good pacing and punishes early enthusiasm. The climb winds its way up through woodland before opening out near the summit, where the famous tower and café await. It’s rarely savage, but it’s relentless – especially late in a long ride. A true test of sustained power.
Surrey Explorer: Climbs, Views & Lanes
4. Box Hill (Zig Zag Road)
- Difficulty: 6/10
- Length: ~4.2 km
- Average Gradient: ~4%
- Max Gradient: ~10%
- Elevation Gain: 166m
- Climb Category: 4
Thanks to the 2012 Olympic road race, Box Hill needs no introduction. The Zig Zag Road is beautifully engineered, never excessively steep, but long enough to quietly drain the legs.
It’s also a favourite benchmark climb – perfect for tempo efforts, group riding, or chasing a Strava segment if you’re feeling brave.
5. Crocknorth Road
- Difficulty: 7/10
- Length: ~700 m
- Average Gradient: ~10%
- Max Gradient: ~14%
- Elevation Gain: 70m
- Climb Category: 4
Short, sharp and awkward, Crocknorth Road is the kind of climb that sneaks up on you. The gradient bites immediately and never really let’s go, making it a perfect launchpad for attacks – or quiet suffering.
6. Barhatch Lane
- Difficulty: 6/10
- Length: ~2.5 km
- Average Gradient: ~6%
- Max Gradient: ~17%
- Elevation Gain: 160m
- Climb Category: 3
Barhatch Lane is a classic example of a climb that lulls you into a false sense of security. The opening section feels manageable, even friendly – until the road ramps up sharply near the top. It’s a favourite inclusion on tougher Surrey routes, especially when legs are already tired.
7. Ranmore Common
- Difficulty: 6/10
- Length: ~2 km
- Average Gradient: ~5%
- Max Gradient: ~13%
- Elevation Gain: 124m
- Climb Category: 4
Ranmore Common is a quieter, more subtle challenge. The gradient never feels outrageous, but it drags on long enough to sap momentum, especially if you underestimate it.
The reward is a smooth road, light traffic, and some of the best views in the Surrey Hills near the top – ideal for steady efforts or regrouping on longer club rides.
8. White Lane
- Difficulty: 8/10
- Length: ~0.6 km
- Average Gradient: ~12%
- Max Gradient: ~21%
- Elevation Gain: 72m
- Climb Category: 4
White Lane makes its intentions clear from the start. Steep, narrow, and demanding, it’s a climb that feels particularly cruel when hit early in a ride. Despite its short length, it delivers a serious punch and is frequently used to thin out groups before the hills really begin.
9. Combe Lane
- Difficulty: 7/10
- Length: ~1.6 km
- Average Gradient: ~7%
- Max Gradient: ~15%
- Elevation Gain: 106m
- Climb Category: 4
Often overshadowed by its bigger neighbours, Combe Lane is a deceptively tough ascent. The gradient fluctuates just enough to disrupt rhythm, making it harder than the numbers suggest. It’s a great climb for building strength and an excellent addition to any Surrey Hills loop looking to keep riders honest.
10. Holmbury Hill
- Difficulty: 7/10
- Length: ~2 km
- Average Gradient: ~1.5%
- Max Gradient: ~11%
- Elevation Gain: 54m
- Climb Category: 4
Holmbury Hill is challenging not because of extreme gradients, but because of its steady and consistent climb. It’s long enough to test your endurance without being overly steep, making it a great test of stamina and mental focus. The road through the woods adds a bit of an extra challenge in terms of technique, and the climb is often used in longer loops and is a favourite of many cyclists in the Surrey Hills. It’s demanding but not as savage as Staple Lane or Whitedown Lane.
Surrey Explorer: Climbs, Views & Lanes
Challenging & Difficult Routes
If you’re looking for the ultimate test, our Challenging Routes filter in the Route Book offers a collection of some of the most demanding cycling routes in the Surrey Hills. These routes are not for the faint of heart, featuring multiple serious climbs that push your endurance to the limit.
Elevation gains range from 1,400m to over 2,400m, ensuring you’ll get a solid workout, whether you’re climbing the steepest hills or tackling the most relentless ascents. These routes are ideal for cyclists who want to test their limits, improve their climbing skills, or simply enjoy the stunning views from some of the hardest climbs in the area. Check out our Challenging Routes page for detailed information and ride suggestions.
Riding the Surrey Hills with London Dynamo
One of the best things about these climbs is how well they link together. With careful route planning, it’s easy to string several of them into a single ride – and just as easy to underestimate how tough that combination will be.
Each week, our regular Sunday Explorer Ride takes you to the Surrey Hills or beyond, exploring the Kent Hills, Essex or the Chilterns. Join our Ride Leaders for an unforgettable guided experience.
For newer riders, the Surrey Hills offer a chance to build confidence and climbing skills. For experienced riders, they provide endless opportunities for hard efforts, testing fitness, and sharpening race legs.
No matter your experience level, one thing is certain: the Surrey Hills will always challenge you and push your limits.
