Durannapass

Overview

The Durannapass is a hors catégorie (HC) climb in Switzerland, rising over 12.9 km of road. It starts at 822 m and tops out at 2,117 m, for a net elevation gain of 1,295 m. That places it firmly in the upper tier of paved climbs: long enough to demand pacing discipline, steep enough on average to punish anyone who starts too hard.

Look closer and the numbers don't reconcile cleanly. The net gain is 1,295 m, but the total ascent is 1,525 m. That 230 m difference is climbing you do twice — road that drops back down and forces you to reclaim height you already earned. On an undulating climb like this, your legs pay for every metre of total ascent, not just the net figure, so budget your effort against the larger number.

How the Gradient Unfolds

The 10.03% average is a blunt instrument. It smooths over recovery flats and disguises the ramps where the road bites hardest — a max gradient far above the mean means the pitch varies wildly. Ride to the average and you'll be over-geared on the walls and spinning out on the dips.

Across the profile, expect:

• Short false-flat or descending sections that briefly drop below the average and let you recover
• Repeated punchy segments that reload the legs before you've fully cleared the last one
• At least one sustained ramp well into the high teens or low twenties — the steepest pitch of the climb, where cadence collapses if your gearing is wrong

Pacing Notes

On an undulating climb, chasing even speed is a trap: you'll spike your power on every ramp and detonate before the summit. Pace to even effort instead. Hold a steady sustainable power output through the steep sections and let your speed rise naturally on the flatter, descending portions — don't force the pace where the road gives it to you for free.

Because the total ascent (1,525 m) exceeds the net gain (1,295 m), the recovery dips are genuine chances to soft-pedal and recharge. Use them. If you don't know your ceiling, run the FTP estimator first and set a target you can hold for the full 12.9 km, not just the opening kilometres.

Gearing

At 10.03% average with a max gradient into the low twenties, this is not a climb for a mid-compact and a narrow cassette. Fit a compact (50/34) or sub-compact chainset and pair it with a wide-range cassette — 34×32 as a minimum, 34×34 if you have any doubt about the steep ramps. The steepest pitch dictates the setup, not the average. Check your chainrings and cassette before the ride; there is no bailout gear to fall back on once you're on the wall.

Summary

• Length: 12.9 km
• Average gradient: 10.03%
• Maximum gradient: 23.8%
• Net elevation gain: 1,295 m
• Total ascent: 1,525 m
• Category: HC

The Durannapass rewards riders who respect the gap between net gain and total ascent. Pace to effort, gear for the steepest ramp, and treat every recovery dip as fuel for the next wall to the 2,117 m summit.