The Côte de Bohisseau leaves Andenelle on Rue de Perwez, climbing south-eastwards away from the low ground beside the Meuse. The road bends through the hillside rather than taking a straight line upwards. Its lower section introduces a firm slope early, then allows the gradient to ease before another stronger passage further into the ascent.
Around 1.7 kilometres at an average of roughly 6% give this climb a compact scale. The average conceals two distinct spells of harder work, separated by easier climbing, and the second makes the upper half more demanding than a gentle middle might suggest. Towards the end the slope softens again, although the road continues to rise. Bohisseau has a useful sense of progression: an early effort, a quieter interval and a renewed climb before the finish.
01 / The ascent
Elevation profile
02 / The numbers
Climb statistics
- Distance
- 1.67 km
- Elevation gain
- 96 m
- Average gradient
- 5.8%
- Climb category
- 4
- Start elevation
- 76 m
- Summit elevation
- 173 m
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.
Use your intended climbing effort, rather than FTP unless you can hold it for the predicted duration.
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.
Modelled moving time
7 min
- Power throughout
- 225 W
- Average speed
- 14.1 km/h
Based on the 1.67 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
Route map
Route overview
Côte de Bohissau
Andenne, Wallonie, Belgium
- Route length
- 1.67 km
- Total ascent
- 96 m
- Average gradient
- 5.8%
05 / Take it home
The climb, as artwork
Turn the route into a personalised topographic print. Choose your colours and composition, then download your artwork.
06 / Keep exploring
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Côte de Beffe
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Côte du Doyard
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Côte de Blegny
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47.2 km away · Explore climb →