Forch

What to Expect on the Forch

The Forch is a Category 4 climb in Switzerland, running 8.8 km from its base at 402 m elevation to a summit at 670 m. The net elevation gain is 268 m, but the total ascent of 424 m tells a more honest story — the road doesn't simply rise in a straight line. There are undulations and rolling sections that add accumulated climbing well beyond the start-to-finish difference.

With an average gradient of 3.05%, the Forch sits firmly in the accessible range. On paper, nothing here should threaten a prepared rider. In practice, the 11.07% maximum gradient is the number that matters most for pacing decisions.

How the Gradient Unfolds

The low average masks the character of the climb. At 3%, long stretches feel like little more than a firm tempo effort — manageable in a relatively large gear, with heart rate sitting comfortably below threshold. However, those sections are punctuated by sharper ramps. The 11% maximum is more than three times the average, which means the steeper pitches are concentrated and abrupt rather than gradually building.

Expect the rhythm to be broken. Riders who lock into a single gear and a single cadence will find themselves either spinning out on the easier stretches or grinding to a halt when a steep ramp arrives. The gap between average and maximum gradient here is larger than it looks — the total ascent of 424 m versus 268 m net gain confirms the road earns its meters in uneven installments.

Pacing Notes

• Don't overcook the flat sections. The long, easier stretches invite surging, especially early. Resist. Burning matches on 2–3% gradients leaves nothing for the 11% ramps.
• Treat the steep pitches as isolated efforts. Rather than trying to hold a fixed power across the whole climb, accept that output will spike on the steep sections. The goal is to limit how deep you go, not to eliminate the variation entirely.
• Use FTP as your reference point. On a Category 4 climb like this, most riders will be working somewhere between 70–85% of FTP across the moderate sections. On the steep ramps, that number climbs sharply. If you're unsure of your current FTP, the FTP estimator can give you a working baseline before you head out.

Gearing Recommendations

Given the 11% maximum, a compact chainset (50/34 or equivalent) with a wide-range cassette is the sensible choice unless you're carrying significant power reserves. There's no shame in having a 32t sprocket available — the 268 m of net gain across 8.8 km doesn't demand it, but the steep ramps will expose anyone who arrives undergeared and already fatigued.

For stronger riders, a standard double is workable. The climb is short enough that the steep sections pass quickly, and the overall load is modest.

The Bigger Picture

The Forch won't appear on anyone's list of alpine monsters. At Category 4 with a gentle average gradient, it's often used as a training climb, a warm-up, or a segment within a longer route in the Zurich hinterland. The honest challenge is the total ascent figure — 424 m of actual climbing across 8.8 km rewards consistent riders who manage effort well over terrain that keeps changing. Treat it as a threshold of awareness rather than an endurance test, and the Forch rewards smart riding.