Mont-Theux climbs westwards from Theux on the N62, passing through Mont on its way out of the Hoëgne valley. The broad road gives the ascent an open, easily read shape, but its gradient is less uniform than the first view suggests. A firm opening is followed by easier ground, with fields and pasture opening around the road as it approaches the village.
The selected climb is about three kilometres long, averaging roughly 5%. Those figures conceal the stronger upper stretch after another easing in Mont. Here the road makes a more forceful final rise before the slope softens towards the wooded high ground. The changes give the ascent separate phases, each with its own demand, rather than one continuous rate of climbing. Mont-Theux earns its character from that late return to harder work on a deceptively straightforward road.
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
11.3%
Where to find it
1.80–2.30 km from start
- Net height gained
- 57 m
- Section length
- 500 m
03 / The numbers
Climb statistics
- Distance
- 2.99 km
- Elevation gain
- 156 m
- Average gradient
- 5.2%
- Climb category
- 4
- Start elevation
- 184 m
- Summit elevation
- 340 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
12 min
- Power throughout
- 225 W
- Average speed
- 14.9 km/h
Based on the 2.99 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 de Mont-Theux
Theux, Wallonie, Belgium
- Route length
- 2.99 km
- Total ascent
- 156 m
- Average gradient
- 5.2%
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 du Doyard
0.5 km · 6.1% · 31 m gain
Sprimont, Walloon Region, Belgium
6.6 km away · Explore climb →
Rosier
4.4 km · 5.8% · 0 m gain
Stoumont, Région wallonne, Belgium
12.9 km away · Explore climb →
Thier de Coo
2.5 km · 8.5% · 210 m gain
Stavelot, Walloon Region, Belgium
16.9 km away · Explore climb →
Route du Ham
1.4 km · 5.6% · 88 m gain
Esneux, Walloon Region, Belgium
17.2 km away · Explore climb →
Côte de Blegny
1.9 km · 4.2% · 81 m gain
Blégny, Région Wallonne, Belgium
17.8 km away · Explore climb →