Larkstone Lane: Cycling Climb

The climb · United Kingdom

About Larkstone Lane

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Simon Warren’s Another 100 Greatest Cycling Climbs

Larkstone Lane rises from the River Manifold valley on the eastern side, winding away from Weag's Bridge towards the higher ground near Wetton. In less than two kilometres, the road changes from a valley crossing into a substantial hillside ascent. The early bends announce that change quickly, with a steep opening that gives little time to settle. The slope continues beyond them, so the first turn is only the beginning of the work.

The climb is interrupted rather than uniform. Higher up, a dip breaks the rising profile before the road climbs again towards the finish. That variation gives it a different feel from a simple ramp: height already gained does not mean that the effort is over. With the Manifold valley falling behind and the surrounding country opening out, Larkstone Lane makes a compact but varied escape onto the upland.

01 / The ascent

Elevation profile

Start 183 m · Summit 306 m

Gradient by distance1.91 km / 128 m gain

0 km0.4 km0.7 km1.1 km1.5 km1.9 km

02 / The numbers

Climb statistics

Distance: 1.91 km
Elevation gain: 128 m
Average gradient: 6.2%
Climb category: 4
Start elevation: 183 m
Summit elevation: 306 m

Current weather

At the climb start

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Weather data: MET Norway

03 / Your effort

How long would it take?

Enter the power you could hold for the whole climb. We calculate a moving time from the elevation profile and the forces you ride against.

Sustained power

W/kg

Use your intended climbing effort, rather than FTP unless you can hold it for the predicted duration.

Rider weight (kg)

Bike + kit weight (kg)

Bike + kit includes clothing, bottles and luggage.

Advanced settings

Defaults represent a road-bike scenario. Adjust these settings to match your tyres, drivetrain and riding position.

Effective drag area (CdA) (m²)

Rolling resistance (Crr)

Drivetrain efficiency (%)

Modelled moving time

10 min

Power throughout: 225 W
Average speed: 10.9 km/h

Based on the 1.86 km elevation profile. Assumes steady power, with no stops, braking or drafting. Rounded to the nearest minute.

The science behind the calculation

For each part of the stored profile, we solve the steady-state cycling power equation for speed, then add distance ÷ speed across the climb. Gravity uses rider + equipment weight; available power is W/kg × rider weight. This uses the profile’s distance and elevation together, without mixing in another route’s metrics.

Power × efficiency = gravity + rolling resistance + air resistance + bearing losses

The resistance equations are adapted from Martin et al. (1998), Validation of a Mathematical Model for Road Cycling Power. Air density changes with profile altitude using NASA’s standard-atmosphere model. This calculator’s adaptation has not been independently validated.

It predicts travel at the power you enter, including on descents. It does not model acceleration, cornering, braking, traffic, wind, changing weather or fatigue. At altitude, choose power you can sustain there: thinner air reduces drag, but this model does not predict its effect on your ability to produce power. Profile quality and assumed equipment settings also affect the result.

04 / On the ground