The climb · Spain
About Alto de l' Angliru
From La Vega in Riosa, the Angliru gives you a little time to find your legs before its harder upper slopes. The easing around Viapará is a chance to recover, but it is too early to celebrate. Beyond it, the steep sections demand a different kind of concentration. You begin to measure progress in turns and manageable stretches of road rather than whole kilometres. A low gear becomes useful long before the climb is done.
La Cueña les Cabres is the name to remember, although the work continues on the ramps above it. Keep your effort controlled wherever the road permits; there is no benefit in arriving at the next steep section already spent. Near the finish, the gradient finally relents. The Angliru’s character lies in that uneven distribution of difficulty: an opening you can manage, followed by an upper half that requires considerably more resolve.
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
19.5%
Where to find it
10.20–10.70 km from start
- Net height gained
- 98 m
- Section length
- 500 m
03 / The numbers
Climb statistics
- Distance
- 12.46 km
- Elevation gain
- 1,248 m
- Average gradient
- 10.0%
- Climb category
- HC
- Start elevation
- 316 m
- Summit elevation
- 1,564 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
1 h 23 min
- Power throughout
- 225 W
- Average speed
- 9.0 km/h
Based on the 12.46 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
Alto de l' Angliru
Riosa, Asturias, Spain
- Route length
- 12.46 km
- Total ascent
- 1,248 m
- Average gradient
- 10.0%
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
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