Cycling Mortirolo Mazzo

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Mortirolo - Mazzo

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Basic data & ranking

Average grade: 10.5 %

Length: 12.4 km

Altitude start: 552 m

Altitude top: 1852 m

Ascent: 1300 m

Maximum: 18 %

Mortirolo rankings

Difficulty ranking world: 195 (all)
Ranking Italy: 29 (all)
Ranking Alps: 3 (all)
Difficulty score: 178.21 what?

Mortirolo ratings

(4.9) Overall

(4.5) Road

(5) Traffic

(4) Amenities

(5) Surroundings

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The Mortirolo is considered to be the toughest mountain one can climb in Italy and many professional cyclers consider it as the most difficult mountain to be climbed in any of the three major tours. Lucho Herrera (1991) referred to Mortirolo as being the "Queen climb of Europe" and Lance Armstrong referred to it as the hardest climb he'd ever ridden.

The Mortirolo is situated in Lombardy. This climb belongs to the Alps. Starting from Mazzo, the Mortirolo ascent is 12.4 km long. Over this distance, you climb 1300 heightmeters. The average percentage thus is 10.5 %. The maximum slope is 18 %.

Look for other sides to climb the Mortirolo.

Since 2005, the Mortirolo will be/was climbed in the following big tour stages:
Giro d'Italia 2015 :  Pinzolo - Aprica on 26/05/2015
Giro d'Italia 2012 :  Caldes Val di Sole > Passo dello Stelvio on 26/05/2012
Giro d'Italia 2008 :  Rovetta - Tirano on 31/05/2008

Profile & route

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Location info

Find climbs close to the Mortirolo: within 10 km - within 20 km - within 50 km

Find all climbs and cols in Lombardy on a map.

Find all climbs in the Alps in Italy on a map.

Stories, information and comments from Mortirolo climbers
Story by Jules from Bristol, United Kingdom, submitted on 07/04/2016
I climbed this in June 2016 as part of a loop from Bormio including the Gavia. I''ve been up a few of the majors in the Alps and Pyrenees but this is truly brutal - the toughest climb I''ve ever done by some margin (it was 35 degrees which didn''t help).

The climb lulls you into a false sense of security at the bottom with short 12% pitches between switchbacks where you get some relief. I knew it was going to be hard work in the middle section but it was much tougher than I was expecting - the 18% ramp at 6km was bloody awful.

It would have probably been quicker to walk but the sense of achievement at the top was terrific.
My personal climb rating:
Story by Roberto Pascani from Las Vegas, United States, submitted on 26/05/2015
I climbed the Mortirolo today. Climbed it on a Pinarello with full Campy Super Record. 39/28 was my easiest gear, and I was in it for at least a third of the climb. I''m 56 years old and a pretty good climber. At my age, it''s the hardest thing i''ve ever done. Because of the Giro, the road was basically closed to traffic, which made it a little easier. If you''re my age and get the chance to do this climb. I suggest you skip it, and go see a movie instead.
My personal climb rating:
Story by Boris Dovala from bratislava, Slovakia, submitted on 11/10/2014
I climbed mortirolo twice from Mazzo, after three days of climbing stelvio from both sides (bormio and trafoi) on 39/25 and I just loved it. Next time I go there I will ride it on 39/28. Whole climb is very good and hard, such as a good hill should be. When I compare it, Stelvio and Umbrailpass were much easier.
My personal climb rating:
Story by philip magnus from muswell hill, United Kingdom, submitted on 10/06/2013
OK this is a story about the Mortirolo road (not on Google maps) from Tovo di Sant''Agata, a village just south of Mazzo. I am 54 years old, endurance guy rather than climber.I rode this as part of the Gran Fondo Stelvio. It is just as steep as the Mazzo climb, but the last two kms are brutally steep, 23%, on a concrete track sometimes unsurfaced. I was riding 34/30 lowest gear. It was a tough grind for 8 kms before the hellish track. I cannot believe that the Zoncolan is tougher than this final stretch.

Still, I would do it again. The Fondo was tough but well organised
My personal climb rating:
Story by Robert Johansson from Malmberget, Sweden, submitted on 16/05/2013
Consistantly steep and long stretches with only a few hair pins makes this a really hard climb. I did it with 39/26 gearing and it was quite a challenge to keep the momentum.
My personal climb rating:
Story by Eudald Llagostera i Torrent from Barcelona, Spain, submitted on 06/02/2013
The know as Mortirolo is "Passo della Foppa". I''d climbed it 6 times. Being a very hard climb, is moreless the 50th in Europe. Nice to climb. I suggest the tour: Bormio-Mazzo-Mortirolo-Veglia-Ponte di Legno-Passo Gavia-Bormio, 110 km - ascent 3.200 meters.
My personal climb rating:
Story by Hugo from gembloux, Belgium, submitted on 28/01/2013
I climbed the Mortirolo in 2011 from Mazzo. Less difficult than the Zoncolan or the Kiztbüheler Horn but more beautiful. The main difference is that you can rest during some parts. A unforgettable climb with . I will come back in 2013
My personal climb rating:
Story by Robert from , The Netherlands, submitted on 27/07/2011
A couple of days after the Zoncolan, I climbed the Mortirolo and it was - or at least seemed - much easier. Still, the middle part (around 5 - 6 k total) is tough and I felt lucky that it was warm, but not hot (like the hell on the Zoncolan). If you can''t get up this beast, don''t try the monster at Ovaro!
My personal climb rating:
Story by Andy Shaker from Los Angeles, United States, submitted on 27/04/2011
I did the Mortirolo and Gavia for a 10,000 foot loop out of Bormio in July 2010. It was a hot day and the Mortirolo was nice because most of it is shaded by trees and the pavement is excellent. Very little traffic but the few cars always seemed to go by on the steepest sections of the narrow road. I was thankful about having a 30x27 since in the three days before I did the GF Pinarello, Sella Ronda Loop, Passo Fedaia, and Stelvio. When I reached the top my water bottles were empty and I choked down a dry salami sandwich not knowing that a nice café was about 1k down the other side. When leaving Bormio stick to the smaller roads below the main highway which is dangerous and filled with trucks.
My personal climb rating:
Story by Richard from Manlius, NY, United States, submitted on 31/05/2010
I climbed the Mortirolo in late May 2010, the day the Giro went through. The climb is very hard with some very steep pitches, but not anywhere near as hard as the Zoncolan, which I had done a few days earlier. The Mortirolo allows you to rest a bit on the switch backs where the Zoncolan has very few. All the same, you need to bring your best legs for this climb and make sure you pace yourself from the very beginning.
My personal climb rating:


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