Cycling Alpe Rossombolmo | Ornavasso, Italy

Italy Alpe Rossombolmo

Alpe Rossombolmo Bike Climb - PJAMM Cycling

39.7

PDI

8.1 mi

DISTANCE

4,551 ft

GAINED

ELEVATION GAINED

10.7 %

AVG. GRADE

AVG. GRADIENT

FULL CLIMB STATS

INTRO

Alpe Rossombolmo is a 13.1 km (8.1 mi) climb out of Ornavasso, a small town in the Val d'Ossola near the northern tip of Lake Maggiore, in Piemonte's Verbano-Cusio-Ossola province. It gains 1,387 m (4,551 ft) at a brutal 10.7% average grade with zero net descent - every meter of the climb counts toward the total.

This is one of the hardest paved climbs in Italy - by most measures tougher than the Mortirolo or the Zoncolan. About a third of the route sits at 10-15%, another stretch climbs 15-20%, and the final kilometers regularly hit 20%+, with the steepest kilometer averaging 20% and pitches over 23%. The pavement degrades as you climb, too: smooth for roughly the first two-thirds, then increasingly cracked and pot-holed, before turning to loose gravel, rock and dirt for the final stretch to the summit.

The Ornavasso area was settled around 1300 by Walser communities who migrated over the Simplon Pass, and their alpine-pasture culture still marks the high ground this road climbs through, including the Santuario della Madonna del Boden along the way.

PLAN YOUR ROUTE

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Average grade is 10.7% with 0 descent. 32% of the climb is at 10-15% grade, 9% is at 15-20%, and 5% is ≥20%. The steepest 500 meters is 20.1% and steepest kilometer 20%.

See more details and tools regarding this climb's grade via the “Profile Tool” button.

Roadway: Paved from Ornavasso for roughly the first two-thirds of the climb, but the surface degrades steadily from there - increasingly cracked and pot-holed through the steep upper sections, and reduced to loose gravel, rock and dirt for the final stretch before the summit. Multiple current (2026) rider reports confirm this rough-upper-section character hasn't changed; a gravel bike or wide tires (30mm+) are strongly recommended for the last few kilometers. Beware of loose debris on the descent.

Traffic: Negligible - this is a narrow, single-lane mountain road with no through-traffic.

Parking: At the parking area roughly one kilometer southeast of the start of the climb (Route Map; Street View). Note that the SS33 (Sempione) through Ornavasso has scheduled nighttime lane closures for roadwork from September through November 2026 - this doesn't affect the climb itself, but allow a little extra time on the drive in during this window.

Provisions: Plenty in Ornavasso before you start, and two seasonal refreshment points along the route in summer - Rifugio Legnano at roughly two-thirds of the way up, and a CAI refuge near Alpe Cortevecchio close to the top - though neither should be relied on outside summer.

Gear: Bring a bike with gearing to match your ability - this climb has extreme gradient in spots, averaging 20%+ over its steepest kilometer. A gravel bike or wide tires (30mm+) are worth considering: the pavement degrades higher up, and the final few kilometers are loose gravel, rock and dirt.

Before heading out on any cycling adventure check out our Things to Bring on a Cycling Trip and use our interactive check list to ensure you don't forget anything.

There are two other World Top 100 climbs in the area: Alpe Fuori and Alpe di Aleccio.

Use the “Routes in Area” button on the menu bar to see other bike climbs in this area.