Trunajoch

Trunajoch cycling climb profile

Trunajoch is not defined by a brutal average gradient. It is defined by duration, elevation gain, and the gap between what the average says and what the road can still do to your legs. The climb runs for 30.6 km, starts at 728 m, and tops out at 2072 m, gaining 1344 m net on the way to the summit. With 1450 m of total ascent, it is not a perfectly clean, steady ramp. There is enough extra climbing beyond the net gain to suggest changes in pitch, rolling sections, or brief losses that interrupt the rhythm.

That matters for pacing. A 4.39% average over this distance can tempt riders into riding it like a long tempo road. The risk is that the average hides the cost of the steeper parts. The listed maximum gradient is 14.99%, which is steep enough to force a meaningful spike in torque if you arrive over-geared or already riding above threshold.

How the gradient unfolds

From the available profile data, the safest way to read Trunajoch is as a long, uneven Category 1 ascent rather than a pure steady-state climb. The overall gradient is moderate, but the 30.6 km length means the metabolic cost accumulates slowly. The difference between net elevation gain and total ascent also points to a climb where momentum and pacing are repeatedly disturbed rather than locked into one consistent slope.

The practical implication is simple: do not let easier gradients convince you the climb is finished early. On a climb this long, false-flat relief can be useful if you use it to reset breathing, fuel, and cadence. It becomes costly if you treat every easing as permission to accelerate hard.

The 14.99% maximum gradient changes the gearing requirement. Even if that pitch is brief, it means Trunajoch can demand a low enough gear to stay seated and controlled when the road bites. Riders who only gear for the 4.39% average may find themselves grinding at exactly the point where they need to preserve muscular endurance.

Pacing and gearing notes

Treat Trunajoch as an endurance climb with selective intensity, not as a threshold test from the bottom. If using power, anchor the opening phase below the effort you would normally hold for a shorter climb, then let the steeper ramps bring power up naturally rather than chasing speed. For more on setting effort from threshold, see /glossary/ftp.

A good pacing plan is:

• Ride the lower slopes with restraint, because 30.6 km is long enough to punish early optimism.
• Use easier sections to recover cadence and fuel rather than to force pace.
• Save your hardest efforts for the steepest ramps, where the 14.99% maximum gradient can make surges unavoidable.
• Choose gearing for the worst gradients, not the average.

The key to Trunajoch is respecting the mismatch between average gradient and maximum pitch. The climb looks manageable on paper at 4.39%, but its length, total ascent, and steepest ramps make it a pacing problem first and a strength problem second.