Aisômont climbs eastwards from Trois-Ponts, following the roads through Noupré and Manonfat towards the higher settlement of Aisômont. The departure near the station gives the ascent a recognisable valley setting, while the succession of small settlements makes it feel like a journey across the hillside. This selected route includes a longer approach than some published profiles of the climb.
At about 4.8 kilometres, it is long enough for the effort to become sustained. The average gradient is around 5%, with the lower part doing more of the work and the slope becoming less demanding higher up. That changing balance gives the finish a different feel from the opening, without removing the uphill task altogether. Aisômont's character lies in its continuity and its connection between settlements. It is a useful reminder that an Ardennes climb can have substance without being a steep wall.
01 / The ascent
Elevation profile
02 / The crux
Where it gets difficult
Choose a distance to find the steepest continuous section of the climb.
Steepest 500 m average
13.8%
Where to find it
1.30–1.80 km from start
- Net height gained
- 69 m
- Section length
- 500 m
03 / The numbers
Climb statistics
- Distance
- 4.80 km
- Elevation gain
- 240 m
- Average gradient
- 5.0%
- Climb category
- 3
- Start elevation
- 254 m
- Summit elevation
- 494 m
04 / 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
18 min
- Power throughout
- 225 W
- Average speed
- 15.8 km/h
Based on the 4.80 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.
05 / On the ground
Route map
Route overview
Côte Aisomont
Trois-Ponts, Wallonie, Belgium
- Route length
- 4.80 km
- Total ascent
- 240 m
- Average gradient
- 5.0%
06 / Take it home
The climb, as artwork
Turn the route into a personalised topographic print. Choose your colours and composition, then download your artwork.
07 / Keep exploring
Nearby climbs
Côte de Brume-Est
2.5 km · 8.1% · 202 m gain
Trois-Ponts, Wallonie, Belgium
0.1 km away · Explore climb →
Thier de Coo
2.5 km · 8.5% · 210 m gain
Stavelot, Walloon Region, Belgium
2.0 km away · Explore climb →
Rosier
4.4 km · 5.8% · 0 m gain
Stoumont, Région wallonne, Belgium
7.0 km away · Explore climb →
Côte du Doyard
0.5 km · 6.1% · 31 m gain
Sprimont, Walloon Region, Belgium
22.2 km away · Explore climb →
Route du Ham
1.4 km · 5.6% · 88 m gain
Esneux, Walloon Region, Belgium
28.0 km away · Explore climb →