Acatenango

Overview

Acatenango is short on paper and brutal in the legs. Over just 3.5 km it averages 10.42%, a figure that leaves no room to hide and no flat sections to recover. You start at 1841 m and finish at 2204 m, a summit that sits well into thin air, and the road tips upward almost immediately. This is a category 2 climb — not the longest tier, but the steepness compresses a serious effort into a tight window. With a net gain of 363 m and a total ascent of 357 m, nearly every metre you climb sticks; there is little rolling relief to give any of it back.

How the Gradient Unfolds

The defining feature here is consistency of pain rather than variety. A 10.42% average across 3.5 km means the road rarely dips below double digits, and the 17.88% max gradient tells you there are ramps that push toward the limit of what you can hold seated. Expect the profile to feel like a staircase with no landings: pitch, brief easing, pitch again. Because the net gain (363 m) slightly exceeds the total ascent (357 m) as measured, there is effectively no descending to interrupt the effort — it is uphill from the first pedal stroke to the last. Plan your worst moments for the steepest kicks, where the gradient climbs toward that 17.88% mark, and treat any section that merely returns to the 10.42% average as your rest.

Pacing Notes

On a climb this steep and this short, pacing is about not blowing up before the top rather than conserving for a long haul. Ride the first kilometre a notch below what feels sustainable — the average of 10.42% will punish anyone who starts hot. A sensible target is to hold just under your threshold and let the gradient, not your ego, dictate cadence. Knowing your FTP turns this into a number you can actually pace to: settle in around threshold and accept that the 17.88% ramps will spike you briefly into the red. If you do not have a current figure, run the numbers through the FTP estimator before you commit to a target power. At 2204 m of altitude, expect your usable power to sag slightly, so build a small margin into whatever number you choose.

Gearing

Do not under-gear this one. A 10.42% average with 17.88% ramps demands generous range, and grinding a big gear over 3.5 km at altitude is a fast route to cramping. A compact 34-tooth chainring paired with a wide cassette is the baseline. A 34×32 is the minimum most riders should bring, and it will feel honest but hard on the steepest pitches. If you value spinning over slogging — or you are carrying fatigue — go straight to a 34×34, which keeps cadence alive where the road bites toward 17.88%. The extra sprockets cost nothing on a climb with no flat and no descent to reward a tall gear.

Summary

Acatenango is a pure test of steep-climbing strength: brief, unrelenting, and high. If you pace the opening conservatively and bring low-enough gearing, the 363 m of gain arrives fast — but it never comes easy.

Length: 3.5 km
Average gradient: 10.42%
Max gradient: 17.88%
Start: 1841 m
Summit: 2204 m
Net gain: 363 m
Total ascent: 357 m
Category: 2