Thurn Pass

What to Expect on the Thurn Pass

The Thurn Pass is a Category 2 climb in Austria that earns its rating through a combination of sustained gradient and at least one genuinely punishing ramp. Over 6.2 km, the road gains 474 m net elevation — rising from 801 m at the base to a summit at 1,275 m — with a total ascent of 536 m that accounts for any undulations along the way. The average gradient of 7.69% places this squarely in the territory where tempo riders start to suffer and climbers find their rhythm.

What makes the Thurn Pass more demanding than its average figure suggests is the maximum gradient of 24.9%. That is not a statistical outlier you can ignore — a ramp approaching 25% will bring most riders to a near-standstill regardless of fitness if they arrive at it already deep in the red. The gap between the average and the maximum tells you the climb is uneven, with at least one concentrated wall buried somewhere in the 6.2 km.

How the Gradient Unfolds

The overall elevation data points to a climb that is neither a gentle false flat nor a uniform grind. With an average of 7.69% and a peak of 24.9%, expect the profile to include:

• Moderate opening kilometres that can tempt you into riding above threshold
• At least one sharp, short wall where gradient spikes dramatically toward that 24.9% maximum
• Possible brief recoveries between steeper sections, reflected in the 62 m difference between net gain and total ascent

Treat the early slopes as a warmup, not an opportunity to bank time. Riders who push hard on the easier lower pitches typically blow up on the steep ramp before the summit.

Pacing Notes

For a climb of this length and average gradient, most trained cyclists will be looking at an effort somewhere between 10 and 20 minutes depending on fitness. That puts it squarely in the FTP-adjacent zone — hard enough to require discipline, short enough that you might be tempted to overcook it from the bottom.

Key pacing principles for the Thurn Pass:

• Ride the first half at a power output you could sustain for twice the climb's length. The real difficulty arrives later.
• When the gradient spikes toward its 24.9% maximum, shift down before you need to — not during. Trying to shift under load on a wall that steep risks dropping your chain or stalling cadence entirely.
• Target a cadence no lower than 60–65 rpm even on the steepest sections. Grinding at 40 rpm to avoid shifting costs more muscular energy than the gear change saves.
• If you're using a power meter, keep an eye on normalised power rather than average — the uneven profile means averages can mask significant overreach on the steep sections. Use the FTP Estimator if you're unsure of your current baseline before attempting this climb at race effort.

Gearing Recommendations

The 24.9% maximum gradient is the determining factor for your gear selection, not the 7.69% average. On a climb that spikes this high:

• Road bike: A compact chainset (50/34) paired with an 11-32 or 11-34 cassette gives adequate range for most riders. An 11-28 will work for strong climbers but leaves little margin on the wall.
• Gravel or adventure bike: A 1x drivetrain with a 40T or 42T cassette ceiling handles the steep ramp without issue.
• Riders on traditional 53/39 setups without a wide-range cassette should be aware they may need to use significant force on the steepest pitch — pre-ride gearing checks are worthwhile.

The Thurn Pass is a legitimate Category 2 effort that rewards honest pacing and punishes ambition in the early kilometres. Respect the maximum gradient, manage your power through the moderate sections, and the summit is achievable without blowing apart.