Piedmont, Italy · from Meana di Susa
Colle delle Finestre
Colle delle Finestre combines 55 stacked hairpins with an unpaved gravel top half. Climbing from Meana di Susa, the road stays locked at a steady 9% gradient, transitioning at km 11 onto a smooth, packed sterrato dirt surface through alpine scenery.
Summit elevation: 2178 m
Route overview
Colle delle Finestre · from Meana di Susa
Schematic road geometry from the routed track, with 33 detected hairpins marked (filled markers are tighter than 15 m radius). Use it to see the shape of the climb, not for navigation.
Measured road detail
Taken from the Colle delle Finestre track used by the 3D flyover: Susa → Meana di Susa → Colle delle Finestre · 909 road points
- Measured length
- 17.7 km
- Measured ascent
- 1699 m
- Elevation range
- 485 → 2178 m
- Hairpins detected
- 33
- Tightest hairpin
- 2.9 m radius
- Surface
- Asphalt · Gravel
The routed track measures susa → meana di susa → colle delle finestre, a slightly different start or finish than the from Meana di Susa profile this page simulates, so its length and ascent are reported separately from the headline figures above.
Tightest hairpins on Colle delle Finestre
- 3.7 km · 660 mRight · 2.9 m
- 8.0 km · 1060 mRight · 6.7 m
- 8.3 km · 1088 mLeft · 7.3 m
- 8.9 km · 1147 mRight · 8.4 m
- 9.2 km · 1178 mRight · 3.6 m
- 15.0 km · 1770 mRight · 6.9 m
Landmarks along the way
- Meana di Susa
- Start of the sterrato
Hairpins and elevations are derived from the routed track; road data © OpenStreetMap contributors (ODbL).
How fast would you climb Colle delle Finestre?
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).
Colle delle Finestre and the Tour
Originally built as a military road to the Forte delle Finestre, the pass entered cycling legend in the 2018 Giro d'Italia. On Stage 19, Chris Froome launched a daring 80 km solo attack on the dirt ramps of the Finestre, taking the pink jersey and winning the Giro.
Simon Yates set the fastest race ascent record of 59:23 on Stage 20 of the 2025 Giro d'Italia. Chris Froome's iconic 2018 move remains the defining Giro solo attack.
59:23 for the 18.5 km ascent during Stage 20 of the 2025 Giro d'Italia. Note: Chris Froome 2018 80 km solo move is featured as the iconic story benchmark.
Riding it yourself
When to go
Open from June to October. The unpaved upper 7.8 km is well-maintained but requires good weather to ride comfortably on a road bike.
Base & logistics
Susa or Meana di Susa is the base town. Use 28mm or wider road tyres to handle the packed gravel section near the top.
FAQ
How long is the Colle delle Finestre climb?
From Meana di Susa, the climb is about 18.5 km with roughly 1700 m of elevation gain at 9.2% 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 Colle delle Finestre?
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.
Can I see Colle delle Finestre in 3D before riding it?
Yes. The route overview on this page has a 3D flyover that follows the real road: 909 routed points covering Susa → Meana di Susa → Colle delle Finestre, with terrain, gradient and the road's own bends. It runs in the browser, no account needed.
How many hairpins does Colle delle Finestre have?
33 hairpin bends are detected on the routed track, the tightest turning inside a 2.9 m radius. They are marked on the 2D sketch and ridden in order in the 3D flyover.
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 Colle delle Finestre?
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 4 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.