Stoss Pass

Overview

The Stoss Pass is a Category 2 climb in Switzerland, running 9.3 km from base to summit with a net elevation gain of 539 m. The average gradient sits at 5.79%, which sounds approachable — but a maximum ramp of 17.13% means the road has teeth. Total ascent across the full profile reaches 575 m, indicating there are minor undulations rather than a purely straight-line grind to the top.

How the Gradient Unfolds

With 539 m of net gain spread across 9.3 km, the Stoss Pass averages out to a steady, manageable pitch. That 5.79% mean gradient places it in the range where most riders can sustain threshold power without blowing up early — but the 17.13% maximum spike is a different matter entirely.

A gap of roughly 36 m between total ascent (575 m) and net elevation gain (539 m) confirms the profile isn't entirely uniform. Expect at least one short descent or flat shelf that temporarily unloads the legs before the gradient kicks back up. Don't mistake those recovery sections for an invitation to surge — the hardest ramp likely comes later in the climb.

Key Gradient Zones

• Lower slopes: With the start elevation at 412 m and the summit at 951 m, the climb opens from relatively low ground. Lower sections often carry more moderate pitches as roads ease into the mountain.
• Mid-climb variations: The profile's undulations suggest the gradient isn't constant. Sections will steepen and relent in sequence before the road commits to the upper slopes.
• Maximum ramp at 17.13%: This is the defining feature. A pitch above 17% demands either a compact chainring setup or a wide-range cassette. On a climb that averages below 6%, encountering nearly 18% is a shock to the system if you've been riding freely.

Pacing Strategy

The moderate average gradient can lull riders into pushing too hard early. Treat the 5.79% mean as a ceiling for sustainable effort in the opening third, not a target to sit at throughout.

Key pacing principles for this climb:

• Set effort by FTP percentage early. On a Cat 2 effort at this length, aim for 85–90% of threshold in the first half. The maximum ramp will demand a sharp, short effort above threshold regardless of how well you've paced the approach.
• Don't chase the undulations. The minor descents that account for the 36 m difference between total ascent and net gain are not rest stops — they're transitions. Spin through them rather than accelerating.
• Gear conservatively for the 17.13% spike. If you're on a compact crankset (50/34), make sure your cassette offers at least a 30t or 32t sprocket. Riders on a standard double should verify they have a bailout gear before starting. Arriving at a near-18% pitch already at lactate threshold is a fast way to blow up the remainder of the ascent.
• Use the FTP estimator to calibrate target watts before attempting to pace this precisely. The variable gradient makes perceived effort unreliable.

Practical Notes

• Distance: 9.3 km — long enough to require genuine pacing discipline, short enough that positive-split mistakes are recoverable if caught early.
• Elevation gain: 539 m net, 575 m total.
• Category: 2 — a serious climb that warrants structured preparation, not an afterthought warmup.
• Country: Switzerland. Road surfaces on Swiss mountain passes are typically well-maintained, but verify current conditions before riding, particularly outside summer months.

For riders building toward bigger Swiss objectives, the Stoss Pass makes a useful benchmark effort. Its combination of length, moderate base gradient, and a single savage ramp mirrors the structure of many alpine approaches.