Asturias, Spain · from La Vega
Alto de l'Angliru by bike
The Angliru is widely considered the hardest climb in professional road cycling. The first half is merely hard; the second half is brutal, with sustained double-digit gradients and the infamous Cueña les Cabres ramp pitching up to around 23%. Gearing choice matters here more than on any other famous climb.
How fast would you climb Alto de l'Angliru?
Enter your power and weight. A physics engine calculates your estimated time against the gradient profile.
Predict your
performance.
See how power and weight affect your time on a real climb.
*Demo simulation uses standard road bike physics (CdA 0.32, Crr 0.004). for custom bike types, surface analysis, and detailed splits.
FAQ
How long is the Alto de l'Angliru climb?
From La Vega, the climb is about 12.4 km with roughly 1248 m of elevation gain at 10.1% average gradient (based on the simplified profile used by this simulator; published figures vary slightly by source).
How long does it take to cycle up Alto de l'Angliru?
It depends almost entirely on your power-to-weight ratio. Use the simulator on this page: enter your FTP and weight, and a physics model (air resistance, rolling resistance, gravity) estimates your time on the gradient profile.
How accurate is the time simulation?
The simulator uses a simplified segment profile and standard road bike assumptions (CdA 0.32, Crr 0.004, 8 kg bike). It does not model wind, drafting, altitude, surface or pacing errors, so treat the result as a realistic estimate, not a guarantee.
How should I train for Alto de l'Angliru?
Sustained climbs reward steady threshold and sweet spot work plus a power-to-weight improvement over weeks, not days. TrainCraft builds structured cycling training plans and adapts them when you miss sessions, using fatigue science (CTL/ATL/TSB).
More famous climbs
Preparing for this climb?
A climb like this is won weeks in advance. TrainCraft builds a structured plan around your FTP and available hours, and adapts it when you miss a workout.
Start Training FreeThe profile is simplified into 6 segments for simulation; real gradients vary metre by metre. Stats shown are derived from this simulated profile and closely match commonly published figures. Time estimates assume standard road bike physics and no wind.
Training for a climb like this?
TrainCraft builds structured training plans and adapts them when life gets in the way — real fatigue science (CTL/ATL/TSB), visual workout builder, Strava & Garmin sync. Free to start.